0001213900-21-046508 | S-1 | XBRL Viewer

Stock-based compensation – Fair value of warrant issued

85,689

43,299

Balance (in Shares) at Dec. 30, 2019

(15,754,428)

Balance at Dec. 30, 2019

$ 15

$ 80

$ 144

$ 20

37,003,971

(22,307,244)

14,696,986

15,493,658

80,000,000

144,875,941

20,000,000

Balance at May. 27, 2019

Balance (in Shares) at May. 27, 2019

Issuance of Class B common stock to Sponsor

^[1]

$ 431

24,569

25,000

Issuance of Class B common stock to Sponsor (in Shares)

^[1]

4,312,500

Sale of 17,250,000 shares of Class A common stock in Initial Public Offering, net of underwriting discount and offering costs

$ 1,725

148,888,387

148,890,112

Sale of 17,250,000 shares of Class A common stock in Initial Public Offering, net of underwriting discount and offering costs (in Shares)

17,250,000

Sale of 545,000 shares of Class A common stock in private placement

$ 54

4,996,341

4,996,395

Sale of 545,000 shares of Class A common stock in private placement (in Shares)

545,000

Common stock subject to redemption

$ (1,543)

(153,909,297)

(344,480)

(154,255,320)

Common stock subject to redemption (in Shares)

(15,425,532)

Balance (in Shares) at Dec. 31, 2019

5,343,820

5,344,820

Balance at Dec. 31, 2019

$ 236

$ 15

$ 431

$ 80

$ 144

$ 20

37,003,971

4,999,340

(22,307,244)

5,000,007

14,696,986

2,369,468

15,493,658

4,312,500

80,000,000

144,875,941

20,000,000

Change in value of Class A common stock subject to possible redemption

$ (11)

(1,209,159)

(1,209,170)

Change in value of Class A common stock subject to possible redemption (in Shares)

(120,917)

Balance (in Shares) at Mar. 31, 2020

1,209,171

Balance at Mar. 31, 2020

$ 225

$ 16

$ 431

$ 70

$ 144

$ 20

37,112,710

4,999,352

(28,565,501)

5,000,008

8,547,459

2,248,551

16,212,408

4,312,500

70,000,000

144,875,941

20,000,000

Balance at Dec. 31, 2019

$ 236

$ 15

$ 431

$ 80

$ 144

$ 20

37,003,971

4,999,340

(22,307,244)

5,000,007

14,696,986

Balance (in Shares) at Dec. 31, 2019

2,369,468

15,493,658

4,312,500

80,000,000

144,875,941

20,000,000

12,281

12,282

791,525

Stock contribution from co-founder (Note 13)

268,676

Stock contribution from co-founder (Note 13) (in Shares)

(10,000,000)

ASC 842 lease accounting adoption

(3,612)

Balance (in Shares) at Jun. 30, 2020

(15,406,868)

Balance at Jun. 30, 2020

$ 212

$ 16

$ 431

$ 70

$ 144

$ 20

37,284,938

4,999,367

(37,717,724)

5,000,010

(432,536)

2,126,344

16,285,183

4,312,500

70,000,000

144,875,941

20,000,000

Balance at Dec. 31, 2019

$ 236

$ 15

$ 431

$ 80

$ 144

$ 20

37,003,971

4,999,340

(22,307,244)

5,000,007

14,696,986

Balance (in Shares) at Dec. 31, 2019

2,369,468

15,493,658

4,312,500

80,000,000

144,875,941

20,000,000

$ 3

91,100

91,103

2,904,347

Stock contribution from co-founder (Note 13)

2,771,163

$ (10)

Stock contribution from co-founder (Note 13) (in Shares)

(10,000,000)

ASC 842 lease accounting adoption

(3,612)

Common stock subject to redemption

$ 430

45,416,946

(2,431,216)

42,986,160

Common stock subject to redemption (in Shares)

4,298,616

Balance (in Shares) at Dec. 31, 2020

(42,986,163)

(307,027,145)

(42,986,163)

(307,027,145)

Balance at Dec. 31, 2020

$ 666

$ 18

$ 431

$ 70

$ 144

$ 20

45,416,946

39,866,244

(40,418,039)

(329,338,001)

5,000,004

(289,471,505)

6,668,084

18,398,005

4,312,500

70,000,000

144,875,941

20,000,000

Balance at Mar. 31, 2020

$ 225

$ 16

$ 431

$ 70

$ 144

$ 20

37,112,710

4,999,352

(28,565,501)

5,000,008

8,547,459

Balance (in Shares) at Mar. 31, 2020

2,248,551

16,212,408

4,312,500

70,000,000

144,875,941

20,000,000

5,095

72,775

Common stock subject to redemption

167,133

$ (13)

(1,222,057)

(1,222,070)

Common stock subject to redemption (in Shares)

(122,207)

Balance (in Shares) at Jun. 30, 2020

1,222,072

(9,152,223)

1,222,072

(9,152,223)

Balance at Jun. 30, 2020

$ 212

$ 16

$ 431

$ 70

$ 144

$ 20

37,284,938

4,999,367

(37,717,724)

5,000,010

(432,536)

2,126,344

16,285,183

4,312,500

70,000,000

144,875,941

20,000,000

Balance at Dec. 31, 2020

$ 666

$ 18

$ 431

$ 70

$ 144

$ 20

45,416,946

39,866,244

(40,418,039)

(329,338,001)

5,000,004

(289,471,505)

Balance (in Shares) at Dec. 31, 2020

6,668,084

18,398,005

4,312,500

70,000,000

144,875,941

20,000,000

Change in value of Class A common stock subject to possible redemption

$ (57)

(5,766,423)

(5,766,480)

Change in value of Class A common stock subject to possible redemption (in Shares)

(576,648)

Balance (in Shares) at Mar. 31, 2021

5,766,486

Balance at Mar. 31, 2021

$ 609

$ 19

$ 431

$ 70

$ 144

$ 20

39,650,523

45,658,057

(34,651,553)

(264,667,197)

5,000,010

(219,008,887)

6,091,436

19,494,628

4,312,500

70,000,000

144,875,941

20,000,000

Balance at Dec. 31, 2020

$ 666

$ 18

$ 431

$ 70

$ 144

$ 20

45,416,946

39,866,244

(40,418,039)

(329,338,001)

5,000,004

(289,471,505)

Balance (in Shares) at Dec. 31, 2020

6,668,084

18,398,005

4,312,500

70,000,000

144,875,941

20,000,000

35,175

35,176

1,256,772

Share repurchase (in Shares)

8,112,004

Share repurchase

(22,000,004)

(70,000,000)

(13,759,298)

(20,000,000)

103,759,298

Balance (in Shares) at Jun. 30, 2021

128,997,958

Balance at Jun. 30, 2021

$ 638

$ 19

$ 431

$ 130

$ (21,999,900)

42,535,328

48,013,423

(37,536,388)

(200,340,043)

5,000,009

(174,326,371)

6,379,970

19,654,777

4,312,500

131,116,643

103,759,298

Balance at Mar. 31, 2021

$ 609

$ 19

$ 431

$ 70

$ 144

$ 20

39,650,523

45,658,057

(34,651,553)

(264,667,197)

5,000,010

(219,008,887)

Balance (in Shares) at Mar. 31, 2021

6,091,436

19,494,628

4,312,500

70,000,000

144,875,941

20,000,000

11,212

160,149

Share repurchase (in Shares)

2,344,154

Share repurchase

$ (70)

$ (14)

$ (20)

$ (21,999,900)

(22,000,004)

(70,000,000)

(13,759,298)

(20,000,000)

103,759,298

Class A shares redeemed

$ (2)

(197,124)

(197,126)

Class A shares redeemed (in Shares)

(19,662)

Change in value of Class A common stock subject to possible redemption

$ 31

3,081,929

3,081,960

Change in value of Class A common stock subject to possible redemption (in Shares)

308,196

Balance (in Shares) at Jun. 30, 2021

(2,884,835)

64,327,154

(2,884,835)

64,327,154

Balance at Jun. 30, 2021

$ 638

$ 19

$ 431

$ 130

$ (21,999,900)

$ 42,535,328

$ 48,013,423

$ (37,536,388)

$ (200,340,043)

$ 5,000,009

$ (174,326,371)

6,379,970

19,654,777

4,312,500

131,116,643

103,759,298

[1]	Included up to 562,500 shares subject to forfeiture if the over-allotment option was not exercised in full or in part by the underwriter.

Condensed Statements of Stockholders' Equity (Deficit) (Unaudited) (Parentheticals) - Preferred stock	7 Months Ended
	Dec. 31, 2019 shares
Sale of net of underwriting discounts and offering expenses	17,250,000
Sale of placement units	545,000

Condensed Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		6 Months Ended		7 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ 64,327,154	$ (9,152,223)	$ 128,997,958	$ (15,406,868)	$ (15,754,428)	$ (307,027,145)	$ (15,754,427)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization			447,986	263,785	203,503	590,070
Amortization of debt discount and issuance costs			3,357,132	18,480		116,074
Decrease in fair value of warrants			(12,537,046)	(6,687)		3,176,770
increase in fair value of SAFE notes			(182,366,571)	3,587,989		267,289,663
Loss on disposal of fixed asset						482,204
Impairment of prepaid launch costs			9,450,000
Stock-based compensation expense			8,112,004	268,676	128,988	2,771,163
Beneficial conversion feature					568,497
Changes in operating assets and liabilities
Purchase of property, machinery and equipment			(2,184,645)	(940,984)	(1,755,701)	(1,501,984)
Purchases of intangible assets			(2,812)	(66,957)	(145,925)	(99,167)
Net cash used in investing activities			(2,187,457)	(1,007,941)	(1,901,626)	(1,601,151)
Receivables					(166,932)	166,932
Prepaids and other current assets			(10,683,257)	(2,112,972)	(1,297,035)	(2,283,070)
Other non-current assets			(2,108,320)	377,500	(1,947,050)	(1,175,450)
Accounts payable			2,695,977	288,447	534,054	(997,438)
Accrued expenses			2,453,959	559,527	608,783	1,812,978
Other current liabilities			2,042,670	1,302,108	(16,870)	211,014
Contract liabilities			450,116	(550,600)	287,000	1,915,524
Deferred rent					51,929
Net change in lease liability and right-of-use-asset						(92)
Lease liability and right of use asset			610,568	41
Other non-current liabilities			5,000,000
Net cash used in operating activities			(44,076,824)	(11,410,575)	(16,799,561)	(32,950,803)
Cash flows from financing activities:
Proceeds from issuance of SAFE notes			30,852,687	7,650,000	10,006,760	44,650,000
Proceeds from issuance of term loan payable			25,000,000	2,457,772		2,457,772
Payment of notes payable						(2,506,772)
Payment of debt issuance costs			(143,705)	(36,938)	(57,699)	(37,659)
Proceeds from issuance of preferred stock					17,999,978
Payment of warrant issuance costs			(31,295)	(721)
Purchase of treasury stock			(3)
Proceeds from issuance of common stock			35,174	12,282		91,103
Net cash provided by financing activities			55,712,858	10,082,395	27,949,039	44,654,444
Increase in cash, cash equivalents and restricted cash			9,448,577	(2,336,121)	9,247,852	10,102,490
Cash, cash equivalents and restricted cash, beginning of period			23,519,546	13,002,056	3,754,204	13,002,056
Cash, cash equivalents and restricted cash, end of period	32,968,123	10,665,935	32,968,123	10,665,935	13,002,056	23,104,546	13,002,056
Conversion of SAFE notes into preferred stock					(7,506,760)
Deferred offering costs in accounts payable and accrued expenses at period end			370,053			505,783
Deferred offering costs in loan payable at period end	1,500,000		1,500,000
Operating lease right-of-use assets in exchange for lease obligations			8,501,073
Supplemental disclosure of cash flow information
Cash paid for income taxes			800	800	800	800
Cash paid for interest			1,000,000	47,032		353,217
Stable Road Acquisition Corp [Member]
Cash flows from operating activities:
Net income (loss)	(2,884,835)	1,222,072	2,881,651	2,431,243	5,343,820	(42,986,163)
Adjustments to reconcile net loss to net cash used in operating activities:
Interest earned on marketable securities held in Trust Account			(23,357)	(1,025,613)	(346,011)	(1,134,391)
Transaction costs allocable to warrant liabilities					857,689
Decrease in fair value of warrants			(10,623,913)	(2,135,400)	(6,139,150)	40,220,713
Prepaid expenses					(268,616)	186,766
Prepaid expenses and other current assets			37,928	133,423
Prepaid income taxes				(330,980)		(328,538)
Accounts payable and accrued expenses			6,694,687	(9,266)
Income taxes payable				(47,567)	47,567	(47,567)
Changes in operating assets and liabilities
Cash withdrawn from Trust Account for taxes			184,489	824,873
Cash withdrawn from Trust Account for redemption of common stock			197,126
Investment of cash into Trust Account					(172,500,000)
Cash withdrawn from Trust Account for taxes						872,653
Net cash used in investing activities			381,615	824,873	(172,500,000)	872,653
Accrued expenses					147,742	2,338,154
Net cash used in operating activities			(1,033,004)	(984,160)	(356,959)	(1,751,026)
Cash flows from financing activities:
Proceeds from promissory note – third party			321,500
Proceeds from promissory note – related party			321,500
Redemption of common stock			(197,126)
Proceeds from sale of Units, net of underwriting discounts paid					169,050,000
Proceeds from sale of Placement Units					5,450,000
Repayment of promissory note – related party					(222,725)
Payment of offering costs					(327,132)
Net cash provided by financing activities			445,874		173,950,143
Increase in cash, cash equivalents and restricted cash			(205,515)	(159,287)	1,093,184	(878,373)
Cash, cash equivalents and restricted cash, beginning of period			214,811	1,093,184		1,093,184
Cash, cash equivalents and restricted cash, end of period	$ 9,296	$ 933,897	9,296	933,897	1,093,184	214,811	$ 1,093,184
Change in value of Class A common stock subject to possible redemption			$ 2,684,520	$ 295,840
Supplemental disclosure of cash flow information
Cash paid for income taxes						405,567
Initial classification of common stock subject to possible redemption					48,042,060
Change in value of common stock subject to possible redemption					6,213,260	(42,986,160)
Initial classification of warrant liabilities					13,996,325
Management adjustment to eliminate negative additional paid-in capital					344,480	$ 2,431,216
Deferred underwriting fee payable					6,900,000
Payment of offering costs through promissory note					222,725
Offering costs paid directly by Sponsor from proceeds from issuance of Class B common stock					$ 25,000

Nature of Operations

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Accounting Policies [Abstract]

Nature of Operations

Note 1. Nature of Operations

Company and Background

Momentus Inc. (“Momentus” or the “Company”) was incorporated in the State of Delaware on May 16, 2017, and is headquartered in Santa Clara, California. The Company plans to offer in-space infrastructure services that can be instrumental to enabling the commercialization of space. The Company plans to partner with launch providers and seeks to offer a range of in-space services, including transportation services, satellite-as-a-service and in-orbit services. The Company’s vehicles will be equipped with a propulsion system (microwave electrothermal thruster) which uses water as a propellant.

On October 7, 2020, the Company entered into an Agreement and Plan of Merger (“Merger Agreement”) with Stable Road Acquisition Corp. (“SRAC”), a publicly listed special purpose acquisition company, Project Marvel First Merger Sub, Inc., a Delaware corporation and a direct, wholly owned subsidiary of SRAC (“First Merger Sub”), and Project Marvel Second Merger Sub, LLC, a Delaware limited liability company and a direct, wholly owned subsidiary of SRAC (“Second Merger Sub”), pursuant to which the First Merger Sub will merge with and into the Company with the Company as the surviving corporation of the First Merger Sub, and immediately following which the surviving corporation will merge with and into the Second Merger Sub, with the Second Merger Sub as the surviving entity (the “Business Combination”). Following the closing of the Business Combination, SRAC will be renamed Momentus Inc. and such combined operating company (the “Combined Company”) would continue to have its Class A common stock and public warrants listed on The Nasdaq Stock Market LLC (“Nasdaq”) and trade under the ticker symbols “MNTS” and “MNTSW”, respectively. Prior to the signing of the Merger Agreement, the Merger Agreement and the transactions contemplated were unanimously approved by the Board of Directors of the Company and SRAC. Closing of the transactions contemplated by the Merger Agreement are subject to the approval by the stockholders of the Company and the SRAC’s stockholders, among other closing conditions.

The Merger Agreement was further amended on March 5, 2021, April 6, 2021 and June 29, 2021, respectively, such that the aggregate merger consideration payable to the holders of Momentus equity interests (including convertible securities) will be paid in shares of the newly issued Combined Company Class A common stock (or securities exercisable for Combined Company Class A common stock) having a value equal to $566,600,000 subject to certain adjustments as set forth in the Merger Agreement as amended.

Note 1. Nature of Operations

Company and Background

Momentus Inc. (“Momentus” or the “Company”) was incorporated in the State of Delaware on May 16, 2017, and is headquartered in Santa Clara, California. The Company is a first mover in offering in-space infrastructure services that will be important to enable the commercialization of space. The Company plans to partner with launch providers and seeks to offer a range of in-space services, including transportation services, satellite-as-a-service and in-orbit services. The Company’s vehicles will be equipped with new electric propulsion system (microwave electrothermal) which uses water as a propellant.

On October 7, 2020, the Company entered into an Agreement and Plan of Merger (“Merger Agreement”) with Stable Road Acquisition Corp. (“SRAC”), a publicly listed special purpose acquisition company, Project Marvel First Merger Sub, Inc., a Delaware corporation and a direct, wholly owned subsidiary of SRAC (“First Merger Sub”), and Project Marvel Second Merger Sub, LLC, a Delaware limited liability company and a direct, wholly owned subsidiary of SRAC (“Second Merger Sub”) , pursuant to which the First Merger Sub will merge with and into the Company with the Company as the surviving corporation of the First Merger Sub, and immediately following which the surviving corporation will merge with and into the Second Merger Sub, with the Second Merger Sub as the surviving entity (the “Business Combination”). Following the closing of the Business Combination, SRAC will be renamed Momentus Inc. and such combined operating company would continue to have its Class A common stock and public warrants listed on Nasdaq and trade under the ticker symbols “MNTS” and “MNTSW”, respectively. Prior to the signing of the Merger Agreement, the Merger Agreement and the transactions contemplated were unanimously approved by the Board of Directors of the Company and SRAC. Closing of the transactions contemplated by the Merger Agreement are subject to the approval by the stockholders of the Company and the SRAC’s stockholders, among other closing conditions.

Summary of Significant Accounting Policies

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Summary of Significant Accounting Policies [Line Items]

Summary of Significant Accounting Policies

Note 2. Summary of Significant Accounting Policies

Our significant accounting policies are detailed in “Note 2. Summary of Significant Accounting Policies” of our Annual Report presented in our S-4/A Registration Statement filed on July 21, 2021. There have been no significant changes to our accounting policies during the three and six months ended June 30, 2021.

Unaudited Interim Financial Information

The accompanying interim condensed financial statements have been prepared in accordance with United States generally accepted accounting principles (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The balance sheet as of December 31, 2020 was derived from the Company’s audited financial statements but does not include all disclosures required by GAAP for audited financial statements. Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as found in the Accounting Standards Codification (“ASC”) and Accounting Standards Update (“ASU”) of the Financial Accounting Standards Board (“FASB”).

The unaudited interim condensed financial statements have been prepared on the same basis as the audited financial statements. In the opinion of the Company’s management, the accompanying unaudited interim condensed financial statements contain all adjustments that are necessary to present fairly the Company’s financial position as of June 30, 2021 and December 31, 2020, the net income/loss for the three and six months ended June 30, 2021 and 2020, the stockholders’ equity for the three and six months ended June 30, 2021 and 2020, and cash flows for the six months ended June 30, 2021 and 2020. Such adjustments are of a normal and recurring nature. The results for the three

and six months ended June 30, 2021 are not necessarily indicative of the results for the year ending December 31, 2021, or for any future period. These interim condensed financial statements should be read in conjunction with the audited financial statements as of and for the years ended December 31, 2020 and 2019, filed with the Securities and Exchange Commission (the “SEC”) in SRAC’s proxy statement on July 21, 2021.

Reclassifications

Certain reclassifications have been made to the prior year’s financial statements to conform to the current year’s presentation. None of the reclassifications have changed the total assets, liabilities, stockholders’ deficit, income, expenses or net losses previously reported.

Going Concern

The Company has a history of operating losses and negative cash flows from operations. Management’s plans to continue as a going concern include raising additional financing, specifically through the Business Combination, and generating long term revenues through multi-year service agreements for its products and services. Prior to the consummation of the Business Combination, the Company will pursue additional debt and/or equity forms of bridge financing, as may be necessary. There can be no assurance that such plans will be successful and, as such, the Company’s management concluded that substantial doubt exists about the Company’s ability to continue as a going concern. Further, the perception that the Company may not be able to continue as a going concern may also make it more difficult to operate its business due to concerns about its ability to meet its contractual obligations.

The Company may need to obtain additional funding whether through private or public equity or debt offerings or a combination thereof, and such additional funding may not be available on terms the Company finds acceptable. If the Company is unable to obtain sufficient capital to continue to advance its products and services, the Company would be forced to delay, reduce or eliminate its research and development programs and any future commercialization efforts. Accordingly, the Company has concluded there is substantial doubt about its ability to continue as a going concern within one year after the date these financial statements are issued.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Management bases its estimates on historical experience and on various other factors it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Accordingly, actual results could differ from those estimates. Significant estimates inherent in the preparation of the financial statements include, but are not limited to, accounting for useful lives of property, machinery and equipment, net, accrued liabilities, income taxes including deferred tax assets and liabilities, impairment valuation and stock-based awards.

COVID-19 Pandemic

As a result of the COVID-19 pandemic, the U.S. government and various states implemented quarantine requirements and travel restrictions. The extent of the impact of COVID-19 on the Company’s financial statements will depend on future developments, including the duration of the outbreak, resurgences and emergence of variants, all of which are highly uncertain and cannot be predicted. The potential impact of COVID-19 on the Company’s operations is inherently difficult to predict and could adversely impact the Company’s business, financial condition or results of operations.

Emerging Growth Company Status

Section 102(b)(1) of the Jumpstart Our Business Startups Act of 2012 (“JOBS Act”) exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can choose not to take advantage of the extended transition period and comply with the requirements that apply to non-emerging growth companies, and any such election to not take advantage of the extended transition period is irrevocable. The Company is an “emerging growth company” as defined in Section 2(a) of the Securities Act of 1933, as amended (the “Securities Act”) and has elected to take advantage of the benefits of the extended transition period for new or revised financial accounting standards. The Company will remain an emerging growth company until the earliest of (i) the last day of the fiscal year in which the market value of Common Stock that is held by non-affiliates exceeds $700 million as of the end of that year’s second fiscal quarter, (ii) the last day of the fiscal year in which the Post-Combination Company has total annual gross revenue of $1.07 billion or more during such fiscal year (as indexed for inflation), (iii) the date on which the Company has issued more than $1 billion in non-convertible debt in the prior three-year period or (iv) December 31, 2024, and the Company expects to continue to take advantage of the benefits of the extended transition period, although it may decide to early adopt such new or revised accounting standards to the extent permitted by such standards. This may make it difficult or impossible to compare the Company’s financial results with the financial results of another public company that is either not an emerging growth company or is an emerging growth company that has chosen not to take advantage of the extended transition period exemptions because of the potential differences in accounting standards used.

Restricted Cash

Restricted cash primarily represents deposited cash that is restricted by financial institutions for three purposes. $515,000 is restricted as collateral for a letter of credit issued to the Company’s landlord in accordance with the terms of a lease agreement entered into in December 2020. A portion of this restricted cash ($100,000) is classified as a current asset as it will be returned to the Company upon the completion of the Business Combination with SRAC, while the remaining $415,000 is classified as a non-current asset as it will be returned to the Company upon the occurrence of future events which are expected to occur beyond at least one year from June 30, 2021. $1,000,000 is restricted for expenditures related to the National Security Agreement (“NSA” see Note 11). $300,000 is restricted, per the June 29, 2021 amendment to the Merger Agreement, for payment of legal fees incurred by SRAC in relation to the Merger Agreement.

Revenue Recognition

The Company enters into contracts for ‘last-mile’ satellite and cargo delivery, payload hosting and in-orbit servicing options with customers that are primarily in the aerospace industry. From inception to June 30, 2021, the Company has not completed a commercial launch of customer cargo and as a result, has not recognized revenue to date for services. However, as of June 30, 2021 and December 31, 2020, the Company has signed contracts with customers including firm orders and options (some of which have already been exercised by customers) and has collected $3,074,940 and $2,624,824, respectively, in customer deposits, which are recorded as current and non-current contract liabilities in the Company’s balance sheet. Included in the collected amount as of June 30, 2021 are customer deposits which had been identified as pending customer refunds at period end, as discussed below, and $1,610,740 of non-current deposits which related to performance obligations not expected to be completed for at least one year.

The Company will recognize revenue (along with any other fees that have been paid) upon the earlier of the satisfaction of the Company’s performance obligation or when the customer cancels the contract. For the six months ended June 30, 2021, the Company recognized revenue related to a customer cancelled contract of $130,000, which was previously recorded as a contract liability and recorded $48,400 as a cost of revenue for costs incurred related to the cancelled contract.

While the Company’s standard contracts do not contain refund or recourse provisions that enable its customers to recover any non-refundable fees that have been paid, the Company may issue full or partial refunds to customers on a case-by-case basis as necessary to preserve and foster future business relationships and customer goodwill. As a result of the Company’s inability to complete any launches in 2021 (refer to Note 3 for additional information), the Company will issue customer refunds of approximately $1.5 million, presented as part of current contract liabilities, in the third quarter, ending September 30, 2021.

Deferred Fulfillment and Prepaid Launch Costs

As of June 30, 2021, and December 31, 2020, the Company had $2,950,000 and $4,650,000, respectively, of deferred fulfillment and prepaid launch costs in the accompanying balance sheets. On May 21, 2021, the Company received notification from SpaceX that it was terminating two launch service agreements for flights scheduled during calendar year 2021 and that they considered the Company to be in default of prior payments totaling $8.7 million. The Company believes the prepayments will be non-recoverable as this was the third time the payload was rescheduled. As a result of the notification from SpaceX, the Company recorded an expense of $8.7 million of current prepaid launch costs during the three months ended June 30, 2021. See Note 3 for more information.

SAFE Notes

The Company issued Simple Agreement for Future Equity (“SAFE”) notes to investors during the three months ended March 31, 2021 and the years ended December 31, 2020 and 2019. The SAFE notes provide the investors the right to certain shares of the Company’s capital stock upon an equity financing. The Company determined that the SAFE notes are not a legal form debt (i.e., no creditors’ rights). The SAFE notes include a provision allowing for the investors to receive a portion of the proceeds upon a change of control equal to the greater of their investment amount or the amount payable based upon a number of shares of common stock equal to the investment amount divided by the liquidity price, the occurrence of which is outside the control of the Company. This provision requires the SAFE notes to be classified as marked-to-market liabilities pursuant to ASC 480. The SAFE notes are recorded as a long-term liability at their estimated fair value. See Note 8 for more information.

Advertising Expenses

Advertising is expensed as incurred. Advertising expense was $0 and $3,548 for the three and six months ended June 30, 2021, respectively, and was $572 and $37,353 for the three and six months ended June 30, 2020, respectively.

Deferred Offering Costs

Offering costs consist of legal, accounting, underwriting fees and other costs incurred that are directly related to the Company’s planned Business Combination. As of June 30, 2021 and December 31, 2020, the Company recorded $6,202,630 and $2,610,024, respectively, of offering costs as a non-current asset. As of June 30, 2021, $4,332,577 of offering costs have been paid and $1,870,053 have been recorded in accrued expenses, accounts payable, and loan payable. As of December 31, 2020, $2,104,241 of offering costs were paid and $505,783 was recorded in accrued expenses.

Basic and Diluted Income (Loss) Per Share

Net income (loss) per share is provided in accordance with FASB ASC 260-10, “Earnings per Share”. The Company’s preferred shares are participating securities as the holders of the preferred shares are entitled to participate in dividends with ordinary shares. Net losses are not allocated to the preferred shares as the holders of the preferred shares do not have a contractual obligation to share in any losses. Accordingly, basic net loss per share is computed by dividing losses available to common stockholders by the weighted average number of common shares outstanding during

the period. Diluted loss per share gives effect to all dilutive potential common shares outstanding during the period. Diluted loss per share excludes all potential common shares and SAFE notes if their effect is anti-dilutive. The table below excludes all potential common shares if their effect is anti-dilutive for the three and six months ended June 30, 2020. There were no anti-dilutive shares for the three and six months ended June 30, 2021.

		Three and Six Months Ended June 30, 2020
Series Seed preferred stock		42,298,151
Series Seed-1 preferred stock		3,563,412
Series Seed-2 preferred stock		4,751,218
Series A preferred stock		61,962,132
Series A-1 preferred stock		32,301,028
FF preferred stock		20,000,000
Options outstanding under stock incentive plan		35,538,222
Options outstanding outside of stock incentive plan		545,454
Common stock warrants		1,250,000
Preferred stock warrants		774,527
SAFE notes outstanding (shares not reserved)		19,489,239
Total		222,473,383

Recently Issued Accounting Standards

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the accounting for income taxes, which simplifies the accounting for income taxes by removing certain exceptions to the general principles in income taxes. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. The Company adopted this standard on January 1, 2021. The adoption of this standard did not have a material impact on the Company’s financial statements.

In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which simplifies the guidance on the issuer’s accounting for convertible debt instruments by removing the separation models for (1) convertible debt with a cash conversion feature and (2) convertible instruments with a beneficial conversion feature. As a result, entities will not separately present in equity an embedded conversion feature in such debt. Instead, they will account for a convertible debt instrument wholly as debt, unless certain other conditions are met. The elimination of these models will reduce reported interest expense and increase reported net income for entities that have issued a convertible instrument that was within the scope of those models before the adoption of ASU 2020-06. Also, ASU 2020-06 requires the application of the if-converted method for calculating diluted earnings per share and the treasury stock method will be no longer available. The provisions of ASU 2020-06 are applicable for fiscal years beginning after December 15, 2021, with early adoption permitted no earlier than fiscal years beginning after December 15, 2020. The Company is currently evaluating the impact of ASU 2020-06 on its financial statements.

Recently Adopted Accounting Standards

In August 2018, the FASB issued ASU 2018-15, Intangibles — Goodwill and Other — Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. This standard requires capitalization of the implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. Further, the standard also requires the Company to expense the capitalized

implementation costs of a hosting arrangement over the term of the hosting arrangement. We adopted ASU 2018-15 on January 1, 2021. As of June 30, 2021, we have recorded $26,149 of capitalized implementation costs incurred in a hosting arrangement.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). This guidance is intended to increase transparency and comparability among organizations by recognizing lease assets and liabilities on the balance sheet and disclosing key information about lease arrangements. The Company adopted the standard as of January 1, 2020, using the modified retrospective approach and has elected to use the optional transition method which allows the Company to apply the guidance of ASC 840, including disclosure requirements, in the comparative periods presented. In addition, the Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification related to agreements entered prior to adoption.

The adoption of the new standard resulted in recognition of operating lease ROU assets and operating lease liabilities of $545,707 and $555,916, respectively, as of January 1, 2020. There was no material cumulative impact of transition to accumulated deficit as of the adoption date. The standard did not materially impact the accompanying statements of operations and had no impact on the accompanying statements of cash flows.

Note 2. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). Certain balances were reclassified for the year ended December 31, 2019 to conform to the current year presentation. There was no impact to operating loss or net loss as a result of these reclassifications.

Going Concern

The Company has a history of operating losses and negative cash flows from operations. Management’s plans to continue as a going concern include raising additional financing, specifically through the Business Combination, and generating long term revenues through multi-year service agreements for its products and services. Prior to the consummation of the Business Combination, the Company is also pursuing debt or equity forms of bridge financing, as may be necessary. There can be no assurance that such plans will be successful and, as such, the Company’s management concluded that substantial doubt exists about the Company’s ability to continue as a going concern. Further, the perception that the Company may not be able to continue as a going concern may also make it more difficult to operate its business due to concerns about its ability to meet its contractual obligations.

The Company will need to obtain additional funding whether through private or public equity or debt offerings or a combination thereof, and such additional funding may not be available on terms the Company finds acceptable. If the Company is unable to obtain sufficient capital to continue to advance its products and services, the Company would be forced to delay, reduce or eliminate its research and development programs and any future commercialization efforts. Accordingly, the Company has concluded there is substantial doubt about its ability to continue as a going concern within one year after the date these financial statements are issued.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Management bases its estimates on historical experience and on various other factors it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Accordingly, actual results could differ from those estimates. Significant estimates inherent in the preparation of the financial statements include, but are not limited to, accounting for useful lives of property, plant and equipment, net, accrued liabilities, income taxes including deferred tax assets and liabilities and impairment valuation and stock-based awards.

COVID-19 Impact

In March 2020, a novel strain of the coronavirus (“COVID-19”) was characterized by the World Health Organization as a global pandemic. As a result of the COVID-19 pandemic, the U.S. government and various states implemented quarantine requirements and travel restrictions.

While the COVID-19 pandemic has affected the Company’s business and its timeline for its formerly planned launch in April 2020, to date, it has not impacted the Company in a way that will materially affect its future growth outlook.

Initially, the Company had a commercial launch scheduled for April of 2020 aboard a Soyuz rocket. However, after the onset of the pandemic, it opted to delay the launch. After further delays from the launch provider, the Company decided to reschedule the launch with a different provider, SpaceX, with whom it expected to launch in January 2021. The scheduled January 2021 launch was then remanifested to a subsequent launch opportunity in 2021 to allow for additional time necessary to secure FAA (“Federal Aviation Administration”) approval of the Company’s payloads.

Cash and Cash Equivalents

Cash and cash equivalents consist of all cash balances and highly liquid investments purchased with a remaining maturity of three months or less. The carrying amount of cash and cash equivalents approximate fair value because of the short-term maturity of these instruments.

Restricted Cash

Restricted cash represents deposited cash that is restricted by a financial institution as collateral for a $515,000 letter of credit issued to our landlord in accordance with the terms of a lease agreement the Company entered into in December 2020. $100,000 of the restricted cash is classified as a current asset as it will be returned to the Company upon the completion of the Business Combination. The remaining amount of restricted cash of $415,000 is classified as a non-current asset as it will be returned to the Company upon the occurrence of future events which are expected to occur beyond at least one year from December 31, 2020.

Receivables

Receivables represent tax credits received from the California Franchise Tax Board.

Prepaids and Other Current Assets

Prepaid and other current assets include prepayments for launch costs, research and development, insurance, and software subscriptions. Prepaid launch costs consist of launch costs paid to third party providers that will carry the transport vehicle to orbit. Prepaid launch costs are recognized upon launch as cost of revenue or research and development expense, and the allocation of the costs is determined based on the distribution between customer and Company payload weight on each launch. The non-current portion of prepaid launch costs is included in other non-current assets in the Company’s balance sheets.

Prepaid research and development costs relate to non-refundable advanced payments in cash for components and materials that will be used in building the Company’s vehicles. The Company conducts research and development activities to develop existing and future technologies that advance its vehicle towards commercialization. As prescribed by ASC 730: Research and Development, non-refundable advance payments for goods or services that will be used or rendered for future research and development activities should be deferred and capitalized. Deferred amounts are recognized as an expense as the related goods are delivered or the services are performed, or when the goods or services are no longer expected to be provided.

Prepaid insurance and prepaid software subscriptions are amortized over the terms of their respective agreements.

Property, Machinery and Equipment, net

Property, machinery and equipment are stated at cost less accumulated depreciation. Depreciation is generally recorded using the straight-line method over the estimated useful lives of the respective assets. The estimated useful lives of fixed assets by asset category are described below:

Fixed Assets		Estimated Useful Life
Computer equipment		Three years
Furniture and fixtures		Five years
Leasehold improvements		Lesser of estimated useful life or remaining lease term
Machinery and equipment		Seven years

Costs of maintenance or repairs that do not extend the lives of the respective assets are charged to expenses as incurred.

Intangible Assets, net

Intangible assets consist of patents and are reported at cost less accumulated amortization and accumulated impairment loss, if any. Amortization is recognized on a straight-line basis over a range of 8 1/2 to 10 years, which is the estimated useful lives of the patents.

Impairment of Long-lived Assets

The Company evaluates the carrying value of long-lived assets on an annual basis, or more frequently whenever circumstances indicate a long-lived asset may be impaired. When indicators of impairment exist, the Company estimates future undiscounted cash flows attributable to such assets. In the event cash flows are not expected to be sufficient to recover the recorded value of the assets, the assets are written down to their estimated fair value. There were no long-lived asset impairments during the years ended December 31, 2020 and 2019.

Revenue Recognition

The Company enters into contracts for ‘last-mile’ satellite and cargo delivery, payload hosting and in-orbit servicing options with customers that are primarily in the aerospace industry. From inception to December 31, 2020, the Company has not completed a commercial launch of customer cargo. However, as of December 31, 2020 the Company has signed contracts with customers and has collected $2,624,824 in customer deposits, which are recorded as current and non-current contract liabilities in the Company’s balance sheets and will be recognized as revenue (along with any other fees that have been paid) upon the earlier of the satisfaction of the Company’s performance obligation or when the customer cancels the contract. For the year ended December 31, 2020, the Company recognized revenue related to customer cancelled contracts of $365,000, which was previously recorded as contract liabilities and recorded $183,811 as contract loss contingencies. There are no refund or recourse provisions that enable our customers to recover any non-refundable fees that are paid.

The Company accounts for customer contracts in accordance with ASC Topic 606, Revenue from Contracts with Customers (“ASC 606”), which includes the following five-step model:

• Identification of the contract, or contracts, with a customer.

• Identification of the performance obligations in the contract.

• Determination of the transaction price.

• Allocation of the transaction price to the performance obligations in the contract.

• Recognition of revenue when, or as, the Company satisfies a performance obligation.

The Company’s contracts are cancellable for convenience by the customer and typically do not contain variable consideration. However, the full transaction price is collected in advance of the scheduled launch and all fees that are paid are non-refundable (and are not limited to deposits), regardless of whether the contract is cancelled by the customer or in the event a performance obligation is not satisfied by the Company.

The Company’s services are considered a single performance obligation, to transport the customers’ payload to a specified orbit in space. The Company recognizes revenue at a point in time when control is transferred, which is considered to be upon the release of the customers’ payload into its specified orbit. The Company will calculate the weight distribution of each transfer vehicle at the customer level and will determine the delivery date for each customer’s payload based on the relative weight of payloads released to determine the point in time to recognize revenue for each payload release.

Deferred Fulfillment and Prepaid Launch Costs

The Company prepays for certain launch costs to third party providers that will carry the transport vehicle to orbit. Prepaid costs allocated to the delivery of a customers’ payload are classified as deferred fulfillment costs and recognized as cost of revenue upon delivery of the customers’ payload. Prepaid costs allocated to the Company’s payload are classified as prepaid launch costs and are expensed to research and development expense upon the release of the Company’s payload. The allocation is determined based on the distribution between customer and Company payload weight on each launch.

As of December 31, 2020, and December 31, 2019, the Company had $4,650,000 and $3,535,550, respectively of deferred fulfillment and prepaid launch costs recorded in the accompanying balance sheets. In December 2020, the Company expensed $1,500,000 of prepaid launch costs as the Company remanifested a scheduled launch with a third-party launch provider to a subsequent launch opportunity in 2021 to allow additional time necessary to secure regulatory approval from the FAA of the Company’s payloads. Of the $1,500,000 prepaid launch costs expensed, approximately $184,000 was recorded as cost of revenue and approximately $1,316,000 was recorded as research and development expenses for the year ended December 31, 2020.

Contract Liabilities

Customer deposits collected prior to the release of the customers’ payload into its specified orbit are recorded as current and non-current contract liabilities in the Company’s balance sheets as the amounts received represent a prepayment for the satisfaction of a future performance obligation that has not yet commenced. Each non-refundable deposit is determined to be a contract liability upon cash collection. Prior to making this determination, the Company ensures that a valid contract is in place that meets the definition of the existence of a contract in accordance with ASC 606.

SAFE Notes

The Company issued Simple Agreement for Future Equity (“SAFE”) notes to investors during the years ended December 31, 2020 and 2019. The SAFE notes provide the investors the right to certain shares of the Company’s capital stock upon an equity financing. The Company determined that the SAFE notes are not a legal form debt

(i.e., no creditors’ rights). The SAFE notes include a provision allowing for the investors to receive a portion of the proceeds upon a change of control equal to the greater of their investment amount or the amount payable based upon a number of shares of common stock equal to the investment amount divided by the liquidity price, the occurrence of which is outside the control of the Company. This provision requires the SAFE notes to be classified as marked-to-market liabilities pursuant to ASC 480. The SAFE notes are recorded as a long-term liability at their fair value. See Note 8 for more information.

Warrants

On January 1, 2019, the Company issued a warrant to an affiliate of an employee covering up to 5,000,000 shares of Class A common stock. The warrant is accounted for under the guidance of ASC 718, Stock-Based Compensation, pursuant to the adoption of ASU 2018-07. See Note 10 for more information.

Fair Value Measurements

The Company follows ASC 820, Fair Value Measurements and Disclosures, which among other things, defines fair value, establishes a consistent framework for measuring fair value and expands disclosure for each major asset and liability category measured at fair value on either a recurring or nonrecurring basis. Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement determined based on assumptions that market participants would use in pricing an asset or liability. Three levels of inputs may be used to measure fair value:

• Level 1 — Observable inputs that reflect quoted prices (unadjusted) for identical, unrestricted assets or liabilities in active markets.

• Level 2 — Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

• Level 3 — Unobservable inputs that are supported by little or no market activity and typically reflect management’s estimate of assumptions that market participants would use in pricing the asset or liability.

The fair values of cash and cash equivalents, accounts receivable, trade accounts payable, and certain prepaid and other current assets and accrued expenses approximate carrying values because of their short-term nature. The carrying value of certain other non-current assets and liabilities approximates fair value. The Company had neither Level 1 nor Level 2 inputs during the years ended December 31, 2020 and 2019. The Company’s SAFE note liabilities are marked-to-market liabilities pursuant to ASC 480 and are classified within Level 3 of the fair value hierarchy as the Company is using a backsolve method within the Black Scholes Option Pricing model, which allowed the Company to solve for the implied value of the business based on the terms of the SAFE investments. Significant unobservable inputs include volatility and expected term. The Company’s warrants are recorded as a derivative liability pursuant to ASC 815 and are classified within Level 3 of the fair value hierarchy as the Company is using the Black Scholes Option Pricing model. Significant unobservable inputs include stock price, volatility and expected term. There were no transfers between levels of input during the years ended December 31, 2020 and 2019.

The estimated fair value of the Company’s financial instruments are as follows:

		December 31, 2020				December 31, 2019
	Level	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial Assets:
SAFE notes	3	$	314,439,663	$	314,439,663	$	2,500,000	$	2,500,000
Warrant liability	3		3,206,185		3,206,185		—		—
Total		$	317,645,848	$	317,645,848	$	2,500,000	$	2,500,000

Cost of Revenue

Cost of revenue consists primarily of expenses associated with the cost of the transport vehicle and third-party launch costs. Until the transport vehicle design is completed and released for production, the cost of these transport vehicles is being expensed as research and development costs as materials and services are received. The current design and technology allow for a single use of the transport vehicle. Cost of revenue recorded for the period ended December 31, 2020 relates to loss contract contingencies of $183,811 due to the manifestation of a scheduled launch, and a reserve for future launches of $183,811.

Advertising Expenses

Advertising is expensed as incurred. Advertising expense for the years ended December 31, 2020 and 2019 was $92,861 and $124,250, respectively.

Leases

The Company leases real estate facilities under non-cancelable operating leases with various expiration dates through fiscal year 2022. The Company determines if an arrangement contains a lease at inception based on whether there is an identified property, plant or equipment and whether the Company controls the use of the identified asset throughout the period of use.

The Company adopted the Accounting Standard Update (“ASU”) No. 2016-02, Leases (Topic 842) on January 1, 2020. The Company elected the package of practical expedients for transition under which the Company did not reassess its prior conclusions about lease identification, lease classification and initial direct costs. Additionally, the Company elected the hindsight practical expedient for transition under which conclusions around lease term and impairment will not be reassessed.

Operating leases are included in the accompanying balance sheets. Operating lease right-of-use (“ROU”) assets represent the Company’s right to use an underlying asset for the lease term and are included in other non-current assets. Lease liabilities represent the Company’s obligation to make lease payments arising from the lease and are included in current and non-current liabilities. Operating lease ROU assets and lease liabilities are recognized at the lease inception date based on the present value of lease payments over the lease term discounted based on the more readily determinable of (i) the rate implicit in the lease or (ii) the Company’s incremental borrowing rate (which is the estimated rate the Company would be required to pay for a collateralized borrowing equal to the total lease payments over the term of the lease). Because the Company’s operating leases generally do not provide an implicit rate, the Company estimates its incremental borrowing rate based on the information available at lease commencement date for borrowings with a similar term.

The Company’s operating lease ROU assets are measured based on the corresponding operating lease liability adjusted for (i) payments made to the lessor at or before the commencement date, (ii) initial direct costs incurred and (iii) tenant incentives under the lease. The Company does not assume renewals or early terminations unless it is reasonably certain to exercise these options at commencement. The Company elected the practical expedient which allows the Company

to not allocate consideration between lease and non-lease components. Variable lease payments are recognized in the period in which the obligation for those payments are incurred. In addition, the Company elected the practical expedient such that it does not recognize ROU assets or lease liabilities for leases with a term of 12 months or less of all asset classes. Operating lease expense is recognized on a straight-line basis over the lease term.

Deferred Offering Costs

Offering costs consist of legal, audit, accounting, and underwriting fees and other costs incurred that are directly related to the Company’s planned merger transaction with SRAC. These costs will be recorded as a reduction to stockholders’ equity (deficit) upon the completion of the merger. During the year ended December 31, 2020 the Company incurred offering costs of $2,610,024. As of December 31, 2020, the Company has recorded $2,610,024 of offering costs as a current asset. As of December 31, 2020, $2,104,214 of the offering costs have been paid and $505,783 have been recorded in accrued expenses.

Income Taxes

The Company accounts for income taxes in accordance with authoritative guidance, which requires the use of the asset and liability method. Under this method, deferred income tax assets and liabilities are determined based upon the difference between the financial statement carrying amounts and the tax basis of assets and liabilities and are measured using the enacted tax rate expected to apply to taxable income in the years in which the differences are expected to be reversed.

Significant judgment is required in determining any valuation allowance recorded against deferred tax assets. In assessing the need for a valuation allowance, management considers all available evidence, including past operating results, estimates of future taxable income, and the feasibility of tax planning strategies.

In the event that management changes its determination as to the amount of deferred tax assets that can be realized, the Company will adjust its valuation allowance with a corresponding impact to the provision for income taxes in the period in which such determination is made.

The Company is required to evaluate the tax positions taken when preparing its tax returns to determine whether tax positions are “more-likely-than-not” of being sustained by the applicable tax authority. Tax benefits of positions not deemed to meet the “more-likely-than-not” threshold would be recorded as a tax expense in the current year. The amount recognized is subject to estimate and management judgment with respect to the likely outcome of each uncertain tax position.

The amount that is ultimately sustained for an individual uncertain tax position or for all uncertain tax positions in the aggregate could differ from the amount that is initially recognized.

Basic and Diluted Loss Per Share

Net loss per share is provided in accordance with FASB ASC 260, “Earnings per Share”. The Company’s preferred shares are participating securities as the holders of the preferred shares are entitled to participate in dividends with ordinary shares. Net losses are not allocated to the preferred shares as the holders of the preferred shares do not have a contractual obligation to share in any losses. Accordingly, basic net loss per share is computed by dividing

losses allocated to common stockholders by the weighted average number of common shares outstanding during the period. Diluted loss per share gives effect to all potential dilutive common shares outstanding during the period. Dilutive loss per share excludes all potential dilutive common shares to be issued if their effect is anti-dilutive as shown below:

	Years Ended December 31,
	2020	2019
Series Seed preferred stock	42,298,151	42,298,151
Series Seed-1 preferred stock	3,563,412	3,563,412
Series Seed-2 preferred stock	4,751,218	4,751,218
Series A preferred stock	61,962,132	61,962,132
Series A-1 preferred stock	32,301,028	32,301,028
FF preferred common stock	20,000,000	20,000,000
Options outstanding under stock incentive plan	29,358,286	24,598,969
Options outstanding outside of stock incentive plan	545,454	545,454
Common stock warrants	1,250,000	1,250,000
Preferred stock warrants	774,527	—
Total	196,804,208	191,270,364

Segment Reporting

Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing operating performance. In consideration of Accounting Standards Codification (“ASC”) 280, “Segment Reporting,” we are not organized around specific services or geographic regions. We currently operate in one service line providing in-space transportation services.

Our chief operating decision maker uses financial information, business prospects, competitive factors, operating results and other non-U.S. GAAP financial ratios to evaluate our performance, which is the same basis on which our results and performance are communicated to our Board of Directors. Based on the information described above and in accordance with the applicable literature, management has concluded that we are organized and operated as one operating and reportable segment.

Recently Issued Accounting Standards

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the accounting for income taxes, which simplifies the accounting for income taxes by removing certain exceptions to the general principles in income taxes. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company does not expect the adoption of this standard to have a material impact on the Company’s financial statements.

In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, (“ASU 2020-06”) which simplifies the guidance on the issuer’s accounting for convertible debt instruments by removing the separation models for (1) convertible debt with a cash conversion feature and (2) convertible instruments with a beneficial conversion feature. As a result, entities will not separately present in equity, an embedded conversion feature in such debt. Instead, they will account for a convertible debt instrument wholly as debt, unless certain other conditions are met. The elimination of these models will reduce reported interest expense and increase reported net income for entities that have issued a convertible instrument that was within the scope of those models before the adoption of ASU 2020-06. Also, ASU 2020-06 requires the application of

the if-converted method for calculating diluted earnings per share and treasury stock method will be no longer available. The provisions of ASU 2020-06 are applicable for fiscal years beginning after December 15, 2021, with early adoption permitted no earlier than fiscal years beginning after December 15, 2020. The Company is currently evaluating the impact of ASU 2020-06 on its financial statements.

Recently Adopted Accounting Standards

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). This guidance is intended to increase transparency and comparability among organizations by recognizing lease assets and liabilities on the balance sheets and disclosing key information about lease arrangements. The Company adopted the standard as of January 1, 2020, using the modified retrospective approach and has elected to use the optional transition method which allows the Company to apply the guidance of ASC 840, including disclosure requirements, in the comparative periods presented. In addition, the Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification related to agreements entered prior to adoption.

Summary of Significant Accounting Policies [Line Items]

Summary of Significant Accounting Policies

NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and in accordance with the instructions to Form 10-Q and Article 8 of Regulation S-X of the SEC. Certain information or footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted, pursuant to the rules and regulations of the SEC for interim financial reporting. Accordingly, they do not include all the information and footnotes necessary for a complete presentation of financial position, results of operations, or cash flows. In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of a normal recurring nature, which are necessary for a fair presentation of the financial position, operating results and cash flows for the periods presented.

The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K/A for the year ended December 31, 2020 as filed with the SEC on June 10, 2021, which contains the consolidated financial statements and notes thereto. The financial information as of December 31, 2020 is derived from the consolidated financial statements presented in the Company’s Annual Report on Form 10-K/A for the year ended December 31, 2020. The interim results for the three and six months ended June 30, 2021 are not necessarily indicative of the results to be expected for the year ending December 31, 2021 or for any future interim periods.

Emerging Growth Company

The Company is an “emerging growth company,” as defined in Section 2(a) of the Securities Act, as modified by the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”), and it may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not emerging growth companies including, but not limited to, not being required to comply with the independent registered public accounting firm attestation requirements of Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive

compensation in its periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved.

Further, Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This may make comparison of the Company’s consolidated financial statements with another public company which is neither an emerging growth company nor an emerging growth company which has opted out of using the extended transition period difficult or impossible because of the potential differences in accounting standards used.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period.

Making estimates requires management to exercise significant judgment. It is at least reasonably possible that the estimate of the effect of a condition, situation or set of circumstances that existed at the date of the consolidated financial statements, which management considered in formulating its estimate, could change in the near term due to one or more future events. One of the more significant accounting estimates included in these financial statements is the determination of the fair value of the warrant liability. Such estimates may be subject to change as more current information becomes available and accordingly the actual results could differ significantly from those estimates.

Class A Common Stock Subject to Possible Redemption

The Company accounts for its common stock subject to possible redemption in accordance with the guidance in Accounting Standards Codification (“ASC”) Topic 480 “Distinguishing Liabilities from Equity.” Common stock subject to mandatory redemption is classified as a liability instrument and is measured at fair value. Conditionally redeemable common stock (including common stock that features redemption rights that is either within the control of the holder or subject to redemption upon the occurrence of uncertain events not solely within the Company’s control) is classified as temporary equity. At all other times, common stock is classified as stockholders’ equity. The Company’s Class A common stock held by Public Stockholders features certain redemption rights that are considered to be outside of the Company’s control and subject to occurrence of uncertain future events. Accordingly, at June 30, 2021 and December 31, 2020, there were 11,395,368 and 11,126,916 shares of Class A common stock subject to possible redemption, respectively, presented as temporary equity, outside of the stockholders’ equity section of the Company’s condensed balance sheets.

Offering Costs

Offering costs consisted of legal, accounting and other expenses incurred through the Initial Public Offering that were directly related to the Initial Public Offering. Offering costs were allocated to the separable financial instruments issued in the Initial Public Offering based on a relative fair value basis, compared to total proceeds received. Offering costs

allocated to warrant liabilities were expensed as incurred in the statements of operations. Offering costs associated with the Class A common stock issued were charged to stockholders’ equity upon the completion of the Initial Public Offering.

Warrant Liabilities

The Company does not use derivative instruments to hedge exposures to cash flow, market, or foreign currency risks. The Company evaluates all of its financial instruments, including issued stock purchase warrants, to determine if such instruments are derivatives or contain features that qualify as embedded derivatives, pursuant to ASC 480 and FASB ASC Topic 815, “Derivatives and Hedging” (“ASC 815”). The Company accounts for warrants as either equity-classified or liability-classified instruments based on an assessment of the warrant’s specific terms and applicable authoritative guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 480, Distinguishing Liabilities from Equity (“ASC 480”) and ASC 815, Derivatives and Hedging (“ASC 815”). The assessment considers whether the warrants are freestanding financial instruments pursuant to ASC 480, meet the definition of a liability pursuant to ASC 480, and whether the warrants meet all of the requirements for equity classification under ASC 815, including whether the warrants are indexed to the Company’s own common shares and whether the warrant holders could potentially require “net cash settlement” in a circumstance outside of the Company’s control, among other conditions for equity classification. This assessment, which requires the use of professional judgment, is conducted at the time of warrant issuance and as of each subsequent quarterly period end date while the warrants are outstanding.

For issued or modified warrants that meet all of the criteria for equity classification, the warrants are required to be recorded as a component of additional paid-in-capital at the time of issuance. For issued or modified warrants that do not meet all the criteria for equity classification, the warrants are required to be recorded at their initial fair value on the date of issuance, and each balance sheet date thereafter. The Company accounts for the warrants issued in connection with its Initial Public Offering in accordance with the guidance contained in ASC 815-40-15-7D, under which the warrants do not meet the criteria for equity treatment and must be recorded as liabilities. Accordingly, the Company classifies the warrants as liabilities at their fair value and adjusts the warrants to fair value at each reporting period. This liability is subject to re-measurement at each balance sheet date until exercised, and any change in fair value is recognized in the Company’s statements of operations. The fair value of the public warrants initially was estimated using a Post-Acquisition Simulation, with subsequent measurements utilizing the public trading price. The fair value of the private warrants was initially and subsequently measured using the Black-Scholes Model (see Note 8).

Income Taxes

The Company follows the asset and liability method of accounting for income taxes under ASC Topic 740, “Income Taxes.” Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statements carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that included the enactment date. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized.

ASC 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more likely than not to be sustained upon examination by taxing authorities. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as income tax expense. There were no unrecognized tax benefits and no amounts accrued for interest and penalties as of June 30, 2021 and December 31, 2020. The

Company is currently not aware of any issues under review that could result in significant payments, accruals or material deviation from its position. The Company is subject to income tax examinations by major taxing authorities since inception.

Net Income (Loss) per Common Share

Net income (loss) per common share is computed by dividing net income (loss) by the weighted average number of shares of common stock outstanding for the period.

The Company’s condensed consolidated statements of operations include a presentation of income (loss) per share for common shares subject to possible redemption in a manner similar to the two-class method of income (loss) per share. Net income per share, basic and diluted, for Class A redeemable common stock is calculated by dividing the interest income earned on the Trust Account net of applicable franchise and income taxes, by the weighted average number of Class A redeemable common stock outstanding since original issuance. Net loss per share, basic and diluted, for Class A and B non-redeemable common stock is calculated by dividing the net loss, adjusted for the net income attributable to Class A redeemable common stock, by the weighted average number of Class A and B non-redeemable common stock outstanding for the period. Class A and B non-redeemable common stock includes the Founder Shares as these shares do not have any redemption features and do not participate in the income earned on the Trust Account.

The following table reflects the calculation of basic and diluted net income per common share (in dollars, except per share amounts):

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
Redeemable Class A Common Stock
Numerator: Net Income allocable to Redeemable Class A Common Stock
Interest Income	$	4,311		$	355,824		$	23,357		$	1,025,613
Less: Income and Franchise Tax available to be withdrawn from the Trust Account		(4,311	)		(355,824	)		(23,357	)		(1,025,613	)
Redeemable Net Income	$	—		$	—		$	—		$	—
Denominator: Weighted Average Redeemable Class A Common Stock
Redeemable Class A Common Stock, Basic and Diluted		17,240,709			17,250,000			17,245,329			17,250,000
Net Income/Basic and Diluted Redeemable Class A Common Stock	$	0.00		$	0.02		$	0.00		$	0.04

Non-Redeemable Class A and B Common Stock
Numerator: Net Income minus Net Income – Basic
Net Income	$	(2,884,835	)	$	1,222,072		$	2,881,651		$	2,431,243
Less: Redeemable Net Income – Basic		—			—			—			—
Non-Redeemable Net Loss	$	(2,884,835	)	$	1,222,072		$	2,881,651		$	2,431,243
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Basic		4,857,500			4,857,500			4,857,500			4,857,500
Net income, Basic Non-Redeemable Class A and B Common Stock	$	(0.59	)	$	0.19		$	0.59		$	0.35

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
Non-Redeemable Class A and B Common Stock
Numerator: Net Income minus Net Earnings – Diluted
Non-Redeemable Net Income – Basic	$	(2,884,835	)	$	1,222,072		$	2,881,651		$	2,431,243
Less: Change in Fair Value of Derivative Liability		(1,904,150	)		(1,185,700	)		(10,623,913	)		(2,135,400	)
Non-Redeemable Net Loss – Diluted	$	(4,788,985	)	$	36,372		$	(7,742,262	)	$	295,843
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Diluted		5,005,558			4,857,500			7,105,104			4,857,500
Net loss, Diluted Non-Redeemable Class A and B Common Stock	$	(0.96	)	$	0.19		$	(1.09	)	$	0.35

Diluted weighted average shares outstanding was calculated using the treasury stock method utilizing a weighted average share price of $11.69 and $15.39 for the three and six months ended June 30, 2021, respectively and the effect of the warrants sold in the Initial Public Offering and the private placement to purchase an aggregate of 8,897,500 shares.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist of a cash account in a financial institution, which, at times, may exceed the Federal Depository Insurance Coverage of $250,000. The Company has not experienced losses on this account and management believes the Company is not exposed to significant risks on such account.

Fair Value of Financial Instruments

The fair value of the Company’s assets and liabilities which qualify as financial instruments under ASC Topic 820, “Fair Value Measurement,” approximate the carrying amounts represented in the accompanying condensed balance sheets, primarily due to their short-term nature.

Recent Accounting Pronouncements

In August 2020, the FASB issued Accounting Standards Update (“ASU”) No. 2020-06, Debt — debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging — Contracts in Entity’ Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’ Own Equity (“ASU 2020-06”), which simplifies accounting for convertible instruments by removing major separation models required under current GAAP. The ASU also removes certain settlement conditions that are required for equity-linked contracts to qualify for the derivative scope exception, and it simplifies the diluted earnings per share calculation in certain areas. The Company adopted ASU 2020-06 on January 1, 2021. Adoption of the ASU did not impact the Company’s financial position, results of operations or cash flows.

The Company’s management does not believe that any other recently issued, but not yet effective, accounting standards if currently adopted would have a material effect on the accompanying condensed consolidated financial statements.

NOTE 2a. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying consolidated financial statements are presented in U.S. dollars and have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and pursuant to the accounting and disclosure rules and regulations of the SEC.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Emerging Growth Company

Further, Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This may make comparison of the Company’s financial statements with another public company which is neither an emerging growth company nor an emerging growth company which has opted out of using the extended transition period difficult or impossible because of the potential differences in accounting standards used.

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.

Class A Common Stock Subject to Possible Redemption

The Company accounts for its Class A common stock subject to possible redemption in accordance with the guidance in Accounting Standards Codification (“ASC”) Topic 480 “Distinguishing Liabilities from Equity.” Shares of Class common stock subject to mandatory redemption are classified as a liability instrument and is measured at fair value. Conditionally redeemable common stock (including common stock that features redemption rights that is either within the control of the holder or subject to redemption upon the occurrence of uncertain events not solely within the Company’s control) is classified as temporary equity. At all other times, common stock is classified as stockholders’ equity. The Company’s Class A common stock held by Public Stockholders features certain redemption rights that are considered to be outside of the Company’s control and subject to occurrence of uncertain future events. Accordingly, at December 31, 2020 and 2019, there were 11,126,916 and 15,425,532, respectively, shares of Class A common stock subject to possible redemption, respectively, presented as temporary equity, outside of the stockholders’ equity section of the Company’s consolidated balance sheets.

Offering Costs

Offering costs consist of legal, accounting, underwriting fees and other costs incurred through the closing date of the Initial Public Offering that are directly related to the Initial Public Offering. Offering costs amounted to $10,924,857, of which $10,067,168 was charged to stockholders’ equity and $857,689 was allocated to the warrants and expensed through the statement of operations, upon the completion of the Initial Public Offering in 2019.

Warrant Liabilities

The Company accounts for warrants as either equity-classified or liability-classified instruments based on an assessment of the warrant’s specific terms and applicable authoritative guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 480, Distinguishing Liabilities from Equity (“ASC 480”) and ASC 815, Derivatives and Hedging (“ASC 815”). The assessment considers whether the warrants are freestanding financial instruments pursuant to ASC 480, meet the definition of a liability pursuant to ASC 480, and whether the warrants meet all of the requirements for equity classification under ASC 815, including whether the warrants are indexed to the Company’s own common shares and whether the warrant holders could potentially require “net cash settlement” in a circumstance outside of the Company’s control, among other conditions for equity classification. This assessment, which requires the use of professional judgment, is conducted at the time of warrant issuance and as of each subsequent quarterly period end date while the warrants are outstanding.

For issued or modified warrants that meet all of the criteria for equity classification, the warrants are required to be recorded as a component of additional paid-in-capital at the time of issuance. For issued or modified warrants that do not meet all the criteria for equity classification, the warrants are required to be recorded at their initial fair value on the date of issuance, and each balance sheet date thereafter. The Company accounts for the warrants issued in connection with its Initial Public Offering in accordance with the guidance contained in ASC 815-40, under which the warrants do not meet the criteria for equity treatment and must be recorded as liabilities. Accordingly, the Company classifies the warrants as liabilities at their fair value and adjusts the warrants to fair value at each reporting period. This liability is subject to re-measurement at each balance sheet date until exercised, and any change in fair value is recognized in the Company’s statement of operations. The fair value of the public warrants initially was estimated using a Post-Acquisition Simulation, with subsequent measurements utilizing the public trading price. The fair value of the private warrants was initially and subsequently measured using the Black-Scholes Model (see Note 9).

Income Taxes

Net Income (Loss) per Common Share

Net income (loss) per common share is computed by dividing net income (loss) by the weighted average number of shares of common stock outstanding for the period. The Company has not considered the effect of warrants sold in the Initial Public Offering and as part of the Placement Units to purchase 8,897,500 shares of Class A common stock in the calculation of diluted income (loss) per share for non-redeemable Class A and Class B common stock, since the exercise of such warrants are contingent upon the occurrence of future events and the inclusion of such warrants would be anti-dilutive.

The Company’s consolidated statements of operations includes a presentation of income (loss) per share for common shares subject to possible redemption in a manner similar to the two-class method of income (loss) per share. Net income per share, basic and diluted, for Class A redeemable common stock is calculated by dividing the interest income earned on the Trust Account net of applicable franchise and income taxes, by the weighted average number of Class A redeemable common stock outstanding since original issuance. Net loss per share, basic and diluted, for Class A and B non-redeemable common stock is calculated by dividing the net loss, adjusted for the net income attributable to Class A redeemable common stock, by the weighted average number of Class A and B non-redeemable common stock outstanding for the period. Class A and B non-redeemable common stock includes the Founder Shares as these shares do not have any redemption features and do not participate in the income earned on the Trust Account.

The following table reflects the calculation of basic and diluted net income (loss) per common share (in dollars, except per share amounts):

	Year Ended December 31, 2020			For the Period from May 28, 2019 (Inception) Through December 31, 2019
Redeemable Class A Common Stock
Numerator: Net Income (loss) allocable to Redeemable Class A Common Stock
Interest Income	$	1,134,391		$	346,011
Income and Franchise Tax		(378,916	)		(167,069	)
Redeemable Net Income	$	755,475		$	178,942
Denominator: Weighted Average Redeemable Class A Common Stock
Redeemable Class A Common Stock, Basic and Diluted		17,250,000			17,250,000
Net Income (loss)/Basic and Diluted Redeemable Class A Common Stock	$	0.04		$	0.01

Non-Redeemable Class A and B Common Stock
Numerator: Net Income (loss) minus Redeemable Net Income (loss)
Net Income (loss)	$	(42,986,163	)	$	5,343,820
Redeemable Net Income (loss)		(755,475	)		(178,942	)
Non-Redeemable Net Income (loss)	$	(43,741,638	)	$	5,164,878
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Basic		4,857,500			4,041,761
Net Income (loss)/Basic Non-Redeemable Class A and B Common Stock	$	(9.00	)	$	1.28
Non-Redeemable Class A and B Common Stock, Diluted		4,857,500			4,168,777
Net Income (loss)/Diluted Non-Redeemable Class A and B Common Stock	$	(9.00	)	$	1.24

Concentration of Credit Risk

Fair Value of Financial Instruments

The fair value of the Company’s assets and liabilities, which qualify as financial instruments under ASC Topic 820, “Fair Value Measurement,” approximates the carrying amounts represented in the accompanying consolidated balance sheets, primarily due to their short-term nature (see Note 9).

Recently Accounting Standards

Management does not believe that any recently issued, but not yet effective, accounting pronouncements, if currently adopted, would have a material effect on the Company’s consolidated financial statements.

Prepaids and Other Current Assets

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Disclosure Text Block Supplement [Abstract]

Prepaids and Other Current Assets

Note 3. Prepaids and Other Current Assets

Prepaids and other current assets consisted of the following:

	June 30, 2021		December 31, 2020
Prepaid launch costs, current	$	800,000	$	2,260,000
Prepaid research and development		3,819,756		1,452,557
Prepaid insurance and other assets		1,121,785		795,727
Total	$	5,741,542	$	4,508,284

As of June 30, 2021 and December 31, 2020, the non-current portion of prepaid launch costs recorded in other non-current assets was $2,150,000 and $2,390,000, respectively.

FAA application

On May 10, 2021, the Company received a letter from the U.S. Federal Aviation Administration (“FAA”) denying the Company’s application for a payload review for the planned June 2021 launch based on the FAA’s finding that its launch would jeopardize U.S. national security. According to the letter, during an interagency consultation, the FAA was informed that the launch of the Company’s payload posed national security concerns associated with the Company’s then current corporate structure. The letter further stated that the FAA understood that the Company was undergoing a process that might resolve the national security concerns, and that the FAA could reconsider a payload application when that process was completed.

As a result of the FAA application denial, on May 21, 2021 the Company received notification from SpaceX that it was terminating two launch service agreements for flights scheduled during calendar year 2021 and that they considered the Company to be in default of prior payments totaling $8.7 million. The Company believes the prepayments will be non-recoverable as this was the third time the payload was rescheduled. As a result of the notification from SpaceX, the Company recorded an impairment charge of $8.7 million of prepaid launch costs during the three months ended June 30, 2021.

Note 3. Prepaids and Other Current Assets

Prepaids and other current assets consisted of the following:

	December 31, 2020		December 31, 2019
Prepaid launch costs-current	$	2,260,000	$	1,603,500
Prepaid research and development		1,452,557		109,264
Prepaid insurance and other assets		795,727		512,450
Total	$	4,508,284	$	2,225,214

As of December 31, 2020, and 2019, the non-current portion of prepaid launch costs recorded in other non-current assets was $2,390,000 and $1,932,050, respectively.

Property, Machinery and Equipment, net

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Machinery and Equipment, net

Note 4. Property, Machinery and Equipment, net

Property, machinery and equipment, net consisted of the following:

	June 30, 2021			December 31, 2020
Computer equipment	$	177,868		$	177,868
Furniture and fixtures		205,976			205,976
Leasehold improvements		897,529			665,146
Machinery and equipment		2,800,170			1,935,974
Construction in-progress		1,913,308			117,655
		5,994,851			3,102,619
Less: accumulated depreciation		(1,207,172	)		(781,519	)
Property, machinery and equipment, net	$	4,787,679		$	2,321,100

Depreciation expense related to property, machinery and equipment was $236,538 and $425,491 for the three and six months ended June 30, 2021, respectively, and was $136,229 and $252,036 for the three and six months ended June 30, 2020, respectively.

Note 4. Property, Machinery and Equipment, net

Property, machinery and equipment, net consisted of the following:

	December 31, 2020			December 31, 2019
Computer equipment	$	177,868		$	109,586
Furniture and fixtures		205,976			131,891
Leasehold improvements		665,146			461,280
Machinery and equipment		1,935,974			1,079,184
Construction in-progress		117,655			229,983
		3,102,619			2,011,924
Less: accumulated depreciation		(781,519	)		(224,842	)
Property, machinery and equipment, net	$	2,321,100		$	1,787,082

Depreciation expense related to property, machinery and equipment for the years ended December 31, 2020 and 2019 was $556,677 and $188,134, respectively.

Intangible Assets, net

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets, net

Note 5. Intangible Assets, net

Intangible assets, net consisted of the following as of June 30, 2021:

		Gross Value			Accumulated Amortization				Net Value			Weighted average remaining amortization period (in years)
Patents/Intellectual Property		$	395,499		$	(73,904	)		$	321,595		7.49

Intangible assets, net consisted of the following as of December 31, 2020:

		Gross Value			Accumulated Amortization				Net Value			Weighted average remaining amortization period (in years)
Patents/Intellectual Property		$	356,890		$	(51,408	)		$	305,482		7.62

Amortization expense related to intangible assets was $12,111 and $22,496 for the three and six months ended June 30, 2021, respectively, and was $8,223 and $15,215 for the three and six months ended June 30, 2020, respectively.

As of June 30, 2021, the future estimated amortization expense related to intangible assets is as follows:

Year ending December 31,	Amount
2021 (remainder)	$	23,602
2022		47,204
2023		47,204
2024		41,444
2025		38,487
Thereafter		123,654
Total	$	321,595

There were no intangible asset impairments during the three and six months ended June 30, 2021 and 2020.

Note 5. Intangible assets, net

Intangible assets, net consisted of the following as of December 31, 2020:

		Gross Value			Accumulated Amortization			Net Value			Weighted average remaining amortization period (in years)
Patents/Intellectual Property		$	356,890		(51,408	)		$	305,482		7.62

Intangible assets, net consisted of the following as of December 31, 2019:

		Gross Value			Accumulated Amortization			Net Value			Weighted average remaining amortization period (in years)
Patents/Intellectual Property		$	235,925		(18,014	)		$	217,911		8.97

Amortization expense related to intangible assets for the years ended December 31, 2020 and 2019 was $33,393 and $15,369, respectively. As of December 31, 2020, the future estimated amortization expense related to intangible assets is as follows:

Year ending December 31,
2021	$	40,062
2022		40,062
2023		40,062
2024		40,062
2025		40,062
Thereafter		105,172
Total	$	305,482

There were no intangible asset impairments during the year ending December 31, 2020 and 2019.

Leases

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Disclosure Text Block [Abstract]

Leases

Note 6. Leases

In January 2021, the Company commenced a new lease at a new location in San Jose, California. The lease expires in February 2028. The Company is obligated to pay approximately $11 million over the term of the lease. The Company leases office space under non-cancellable operating leases with terms expiring from December 2021 through February 2028. The leases require monthly lease payments that are subject to annual increase throughout the lease term.

The Company adopted ASC 842 as of January 1, 2020, using the modified retrospective approach. Rent expense was $435,487 and $870,975 for the three and six months ended June 30, 2021, respectively, and was $67,896 and $135,791 for the three and six months ended June 30, 2020, respectively.

The Company performed evaluations of its contracts and determined that each of its identified leases are classified as operating leases. The components of operating lease expense were as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Operating lease cost	$	435,487	$	67,896	$	870,975	$	135,791
Variable lease expense		147,412		6,508		294,825		12,215
Short-term lease expense		2,965		1,847		6,236		2,380
Total lease expense	$	585,864	$	76,251	$	1,172,036	$	150,386

Variable lease expense consists of the Company’s proportionate share of operating expenses, property taxes, and insurance.

The lease right of use assets and lease liabilities recognized in the balance sheets are as follows:

	As of June 30, 2021
Right of use asset in other non-current assets	$	8,156,424

Other current liabilities	$	1,009,827
Other non-current liabilities		7,767,283
Total lease liability	$	8,777,110

As of June 30, 2021, the maturities of the Company’s operating lease liabilities were as follows:

Remainder of 2021	$622,375
2022	1,561,154
2023	1,533,222
2024	1,580,157
2025	1,627,092
Thereafter	3,700,071
Total lease payments	10,624,071
Less: Imputed interest	(1,846,961)
Present value of lease liabilities	$8,777,110

Note 6. Leases

The Company leases office space under non-cancellable operating leases with terms expiring in December 2021 and February 2028. The leases require monthly lease payments that are subject to annual increase throughout the lease term.

The Company adopted ASC 842 as of January 1, 2020, using the modified retrospective approach. For the year ended December 31, 2020, rent expense was $305,072.

The Company performed evaluations of its contracts and determined that each of its identified leases are classified as operating leases. The components of operating lease expense were as follows:

	Year ended December 31, 2020
Operating lease cost	$	271,582
Variable lease expense		24,430
Short-term lease expense		9,060
Total lease expense	$	305,072

Variable lease expense consists of the Company’s proportionate share of operating expenses, property taxes, and insurance and is classified as lease expense due to the Company’s election to not separate lease and non-lease components.

The lease right of use assets and lease liabilities recognized in the balance sheets are as follows:

	As of December 31, 2020
Right of use asset in other non-current assets	$	316,040

Other current liabilities		254,197
Other non-current liabilities		71,961
Total lease liability	$	326,158

As of December 31, 2020, scheduled maturities of the Company’s operating lease liabilities were as follows:

2021	$	279,793
2022		67,045
Total lease payments		346,838
Less: Imputed interest		(20,680	)
Present value of lease liabilities	$	326,158

The following is a schedule of future minimum operating lease payments as of December 31, 2020:

Year ending December 31,
2021	$	279,793
2022		67,045
2023 and thereafter		—
Total	$	346,838

Accrued Expenses

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Payables and Accruals [Abstract]

Accrued Expenses

Note 7. Accrued Expenses

Accrued expenses consisted of the following:

	June 30, 2021		December 31, 2020
Compensation expense	$	1,329,206	$	1,370,575
Legal and other professional services		2,006,422		268,266
Research and development projects		909,900		517,256
Offering costs		359,558		505,783
Payroll tax expense		327,809		327,734
Other current expense		352,769		74,266
Total	$	5,285,664	$	3,063,880

Note 7. Accrued Expenses

Accrued expenses consisted of the following:

	December 31, 2020		December 31, 2019
Compensation expense	$	1,326,311	$	517,290
Other current expense		904,052		156,842
Offering costs		505,783		—
Payroll tax expense		327,734		37,332
Total	$	3,063,880	$	711,464

Safe Notes

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Debt Disclosure [Abstract]

SAFE Notes

Note 8. SAFE Notes

The Company has issued Simple Agreement for Future Equity (“SAFE”) notes to investors. For the six months ended June 30, 2021, the Company issued SAFE notes to investors in exchange for aggregate proceeds of $30,852,687. The SAFE notes allow the investors to participate in future equity financings through a share-settled redemption of the amount invested at a discounted price to the price paid by other investors. That is, upon a future equity financing involving preferred shares, SAFE notes settle into a number of preferred shares equal to the invested amount of the SAFE note divided by a discounted price to the price investors pay to purchase preferred shares in the financing (with such discounted price calculated as a percentage of the price investors pay to purchase preferred shares in the financing or by reference to a valuation cap). Alternatively, upon the occurrence of a change of control or an initial public offering (other than a qualified financing), the investors shall have the option to receive either (i) cash payment equal to the invested amount under such SAFE note, or (ii) a number of shares of common stock equal to the invested amount divided by the liquidity price set forth in the applicable SAFE notes.

The Company determined that the SAFE notes are not a legal form debt (i.e., no creditors’ rights). The SAFE notes include a provision allowing for cash redemption upon the occurrence of a change of control, the occurrence of which is outside the control of the Company. The provision requires the SAFE notes to be classified as marked-to-market liabilities pursuant to ASC 480. As of June 30, 2021 and December 31, 2020, the estimated fair value of the SAFE notes was $162,925,780 and $314,439,663, respectively. The income (loss) reported from the decrease (increase) in the estimated fair value of the SAFE notes, including those issued during the period, was $100,802,979 and $182,366,571 for the three and six months ended June 30, 2021, respectively, and was $(3,586,605) and $(3,587,989) for the three and six months ended June 30, 2020, respectively, and is included in other income (expense) within the accompanying statements of operations.

There were no SAFE notes converted into shares of the Company’s preferred stock during the six months ended June 30, 2021 and 2020. SAFE notes with a principal amount totaling $78,002,687 and $47,150,000 remained outstanding as of June 30, 2021 and December 31, 2020, respectively.

Conversion or Cash-out Events

In the event of an equity financing in which the Company issues and sells preferred stock for the purpose of raising capital, the SAFE notes will convert into a series of preferred stock of the Company. In the event of a sale of the Company or upon closing of the Business Combination, the SAFE notes will convert into common shares. The number of shares of preferred stock will be determined by the issuance price of the SAFE notes and the applicable discount on the conversion shares, or valuation cap. There was a 20% discount associated with the SAFE notes issued during the six months ended June 30, 2021 and their valuation cap was originally $1.2 billion but was subsequently amended on June 29, 2021, updating their valuation cap to $566.6 million.

In the event of a liquidity event (i.e., a change of control or initial public offering, including a Special Purpose Acquisition Company “SPAC” initial public offering), SAFE note holders will be treated as follows: (i) if in connection with the consummation of a SPAC involving SRAC, the price per share equal to the base value divided by the liquidity capitalization, and multiplied by the discount rate, or (ii) in all other cases, the SAFE note holders will receive the lesser of (x) the price per share equal to the fair market value of the Common Stock at the time of the liquidity event, as determined by reference to the purchase price payable in connection with such liquidity event, multiplied by the discount rate or (y) the post-money valuation cap divided by the liquidity capitalization.

Preference Upon Dissolution

Should the Company dissolve or wind-up operations prior to a conversion or cash-out event, SAFE note holders will be treated like a holder of standard non-participating Preferred Stock.

Note 8. SAFE Notes

The Company has issued Simple Agreement for Future Equity (“SAFE”) notes to investors. For the year ended December 31, 2020, the Company issued SAFE notes to investors in exchange for aggregate proceeds of $44,650,000. The SAFE notes allow the investors to participate in future equity financings through a share-settled redemption of the amount invested at a discounted price to the price paid by other investors. That is, upon a future equity financing involving preferred shares, SAFE notes settle into a number of preferred shares equal to the invested amount of the SAFE note divided by a discounted price to the price investors pay to purchase preferred shares in the financing (with such discounted price calculated as a percentage of the price investors pay to purchase preferred shares in the financing or by reference to a valuation cap). Alternatively, upon the occurrence of a change of control, an initial public offering or the consummation of a business combination with a special purpose acquisition company (including the Business Combination), each investor shall receive a portion of the proceeds equal to the greater of (i) the invested amount under its SAFE note, or (ii) the amount payable on the number of shares of common stock equal to the invested amount divided by the liquidity price set forth in the applicable SAFE notes.

The Company determined that the SAFE notes are not a legal form of debt (i.e., no creditors’ rights). The SAFE notes include a provision allowing for the investors to get a portion of the proceeds in a change of control equal to the greater of their investment amount or the amount payable upon a number of shares of common stock equal to the investment amount divided by the liquidity price set forth in the applicable SAFE notes, the occurrence of which is outside the control of the Company. This provision requires the SAFE notes to be classified as marked-to-market liabilities pursuant to ASC 480. As of December 31, 2020, and 2019, the fair value of the SAFE notes was $314,439,663 and $2,500,000, respectively. The expense reported from the increase in the fair value of the SAFE notes for the year ended December 31, 2020 was $267,289,663 and is included in other income (expense) within the accompanying statements of operations. In addition, pursuant to the guidance in ASC 825, “Financial Instruments”, the Company expensed $1.0 million of fees incurred in connection with the SAFE notes issued during the year ended December 31, 2020. This amount has been included in other expense within the accompanying statements of operations.

SAFE notes totaling $7,506,760 were converted into 32,301,028 shares of the Company’s preferred stock in connection with equity financings during the year ended December 31, 2019. There were no SAFE notes converted during the year ended December 31, 2020. SAFE notes with a principal amount totaling $47,150,000 and $2,500,000 remained outstanding as of December 31, 2020 and December 31, 2019, respectively.

Conversion or Cash-out Events

In the event of an equity financing in which the Company issues and sells preferred stock for the purpose of raising capital, the SAFE notes will convert into a series of preferred stock of the Company. The number of shares of preferred stock issued will be determined pursuant to the terms of the SAFE notes and the applicable discount to the price per share of the preferred stock sold in such equity financing and the applicable valuation cap set forth in the applicable SAFE notes. There was a 20% discount and a valuation cap of $150,000,000 associated with the outstanding SAFE notes issued during the year ended December 31, 2019. For the year ended December 31, 2020, SAFE notes with aggregate principal amounts of $9,650,000 and $35,000,000, were issued with no discount and valuation caps of $150,000,000 and $300,000,000, respectively.

In the event of a liquidity event (i.e. a change of control, initial public offering or the consummation of a business combination with a special purpose acquisition company, including the Business Combination), SAFE note holders will receive a portion of the proceeds payable in such liquidity event equal to the greater of the purchase amount of the applicable SAFE notes and the amount payable on the number of shares of common stock equal to the purchase amount divided by the liquidity price set forth in such SAFE notes in exchange for their SAFE notes.

Preference Upon Dissolution

Should the Company dissolve or wind-up operations prior to a conversion or cash-out event, SAFE note holders will be treated like a standard non-participating Preferred Stock.

Embedded and Beneficial Conversion Features

The Company assessed the embedded conversion and redemption features of the SAFE notes pursuant to ASC 815, and concluded no embedded derivatives required bifurcation. The Company further assessed the embedded conversion features of the SAFE notes under ASC 470-20 and determined that contingent beneficial conversion features (BCFs) existed. Upon the conversion of the SAFE notes, the contingency was resolved and the BCFs were measured at their intrinsic value. BCFs associated with converted SAFE notes totaled $568,479 during the year ended December 31, 2019 and were recorded as interest expense and additional paid-in-capital. There was no BCFs recorded in the year ended December 31, 2020.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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Stockholders' Equity and Stock-based Compensation [Line Items]

Loan Payable

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Debt Disclosure [Abstract]

Loan Payable

Note 9. Loan Payable

Term Loan

On February 22, 2021, the Company entered into a Term Loan and Security Agreement (“Term Loan”) which provided the Company with up to $40,000,000 at an annual interest rate of 12%. $25,000,000 of the Term Loan was immediately available for borrowing by the Company at the inception of the agreement, the Company borrowed this amount on March 1, 2021. The remaining $15,000,000 is no longer available for borrowing as the Company did not achieve certain milestones needed by the June 30, 2021 deadline. The repayment terms of the Term Loan provides for interest-only payments beginning March 1, 2021 through February 28, 2022. The principal amount is due and payable on March 1, 2022. At the Company’s option, the principal amount of the Term Loan outstanding on March 1, 2022 may be repaid over one or two years beginning on March 1, 2022.

In conjunction with the Term Loan, warrants to purchase preferred stock up to 1% of the fully diluted capitalization (including allowance for conversion of all outstanding convertible notes, SAFE notes and such warrants) of the Company were granted to the lender exercisable at the lender’s option. 80% of the 1% of the warrants were earned by the lender at the completion of the agreement. The additional 20% of the warrants was forfeited as of June 30, 2021. The stock purchase warrant expires on June 30, 2031. The warrant’s original estimated fair value of $15,647,538 was recorded as a derivative liability under ASC 815, Derivatives and Hedging, with the offset recorded as a debt discount. See also Note 10 for discussion on the valuation and recording of the warrants as of June 30, 2021.

Additionally, the Company incurred debt issuance costs of $143,705, which were recorded as a direct deduction from the carrying amount of the Term Loan. The original issuance discount, warrant discount and debt issuance costs are being amortized as interest expense using the effective interest rate method through the term of the loan. Interest expense amortization was $2,633,820 and $3,350,491 for the three and six months ended June 30, 2021, respectively.

The Company allocated the proceeds from the Term Loan agreement to the convertible note and warrants comprising the financing agreement based on the relative fair value of the individual securities on the February 22, 2021 closing date of the agreements. The discount attributable to the convertible note, an aggregate of $15,647,538, is amortized using the effective interest method over the one-year term of the note, maturing on March 1, 2022. Because the discount on the convertible note exceeds 63% of its initial face value, and because the discount is amortized over the period from issuance to maturity of one year, the calculated effective interest rate is 125.97%.

Equipment Loan

Equipment Loan was fixed at 9.75%. The Company was also obligated to pay a final amount equivalent to 5 percent of the loan, and the final amount was expensed as interest expense over the term of the Equipment Loan using the effective interest rate. The borrowings were collateralized by all of the equipment financed by the lender. On March 9, 2020, the Company borrowed $1,536,772 under the Equipment Loan. The borrowings included an original issuance discount of $49,000. Pursuant to the terms of the Equipment Loan, the first six months of payments were interest only and monthly payments, including principal and interest of $57,929, began September 1, 2020 and were scheduled to end September 1, 2023.

In conjunction with the Equipment Loan, a stock purchase warrant was also issued to the lender, which allows for the purchase of Series A Preferred Stock or Preferred Stock in a subsequent round of financing in an amount of $225,000. Under the stock purchase warrant agreement, the lender is also provided the right to invest up to an additional $250,000 in the Company’s equity or convertible debt issued in future offerings. The lender exercised this right with the SAFE notes issued in February 2021. The stock purchase warrant expires on March 9, 2030. The warrant’s original estimated fair value of $29,415 was recorded as a derivative liability under ASC 815, Derivatives and Hedging, with the offset recorded as a debt discount (See Note 10).

Additionally, the Company incurred debt issuance costs related to the Equipment Loan of $37,659, which were recorded as a direct deduction from the carrying amount of the Equipment Loan. The original issuance discount, warrant discount and debt issuance costs were being amortized as interest expense using the effective interest rate method through the term of the loan. Interest expense amortization was $14,552 and $18,192 for the three and six months ended June 30, 2020, respectively. In December 2020, all of the outstanding principal and accrued interest of $1,536,772 under the Equipment Loan was paid off and the Equipment Loan facility was terminated. The unamortized original issuance discount, warrant discount and debt issuance cost of $67,537 was fully expensed in December 2020. The warrant remains outstanding as of June 30, 2021.

Promissory Notes

On June 29, 2021, the Company and SRAC amended the Merger Agreement which, among other things, provided for the issuance by the Company of two second lien notes (“Promissory Notes”). The notes, in the amount of $1,500,000 each, are held by the Company’s outside counsel and SRAC’s counsel, and are for certain legal fees and expenses incurred by SRAC and the Company in relation to the Merger Agreement. There is no interest rate attached to Promissory Notes as of June 30, 2021, however, if the Company fails to comply with certain obligations of the agreements, a rate of Prime plus 2.00% will be applied. The notes are due and payable when called by each holder and may only be called after August 13, 2021.

The Company’s Term Loan payable consists of the following at June 30, 2021:

	June 30, 2021
Gross Term Loan	$	25,000,000
Less: Unamortized debt discount and issuance costs		(12,465,407	)
Promissory Notes	$	3,000,000
Net notes payable, (all current)	$	15,534,593

There are no principal payments due on the Term loan until March 1, 2022 when the entire loan is due and payable.

Note 9. Loan Payable

In March 2020, the Company entered into an equipment financing agreement to fund the acquisition of specific and eligible equipment (“Equipment Loan”). The Equipment Loan provides the Company access to borrow up to $4,500,000. Repayment of any amounts issued under the Equipment Loan occurs over 30 months. Interest under the Equipment Loan is fixed at 9.75% and the borrowings may be prepaid as long as the Company provides written notice to the lender (10) business days prior to the prepayment and the Company pays (a) all accrued and unpaid interest on the equipment loan as of the date of prepayment; plus (b) an amount equal to the total amount of all scheduled but unpaid payments of principal; plus (c) an amount equal to all interest that would have accrued on the equipment loan from the date of prepayment through the last scheduled payment. The Company is also obligated to pay a final amount equivalent to 5 percent of the loan, the final amount is being expensed as interest expense over the term of the Equipment Loan using the effective interest rate. The borrowings are collateralized by all of the equipment financed by the lender. On March 9, 2020, the Company borrowed $1,536,772. The borrowings included an original issuance discount of $49,000. Pursuant to the terms of the Equipment Loan, the first six months of payments were interest only and monthly payments including principal and interest of $57,929 begin September 1, 2020 and end September 1, 2023.

In conjunction with the equipment financing agreement, a stock purchase warrant was also issued to the lender, which allows for the purchase of a number of shares of Series A Preferred Stock (or, subject to certain conditions, Preferred Stock in a subsequent round of financing) equal to $225,000 divided by the price per share in the applicable round of financing. Under the warrant agreement, the lender is also provided certain rights to invest up to an additional $250,000 in the Company’s equity or convertible debt issued in future offerings. The warrant expires on March 9, 2030. The original fair value of the warrant of $29,415 was recorded as a derivative liability with the offset recorded as a debt discount (See Note 10).

Additionally, the Company incurred debt issuance costs of $37,659, which were recorded as a direct deduction from the carrying amount of Equipment Loan. The original issuance discount, warrant discount and debt issuance costs are being amortized as interest expense using the effective interest rate method through the term of the loan.

In December 2020, all of the outstanding principal and accrued interest of $1,536,772 under the Equipment Loan was paid off and the Equipment Loan facility was terminated. The unamortized original issuance discount, warrant discount and debt issuance cost of $116,074 was fully expensed in December 2020. The warrant remains outstanding.

PPP Loan

In May 2020, the Company received a Paycheck Protection Program loan (“PPP Loan”) in the amount of $970,000. The loan was issued under the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”). The PPP Loan is subject to forgiveness if the Company uses the funds for applicable expenses outlined in the CARES Act. Any portion of the PPP Loan that is not forgiven must be repaid within two years. The PPP Loan bears interest at 1.0% per annum. In September 2020, the Company repaid the PPP Loan in full.

Stockholders' Equity and Stock-based Compensation

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Stockholders’ Equity and Stock-based Compensation

Note 10. Stockholders’ Equity and Stock-based Compensation

The Company has reserved shares of Class A Common Stock for issuance for the following purposes as of June 30, 2021:

Series Seed preferred stock		28,538,853
Series Seed-1 preferred stock		3,563,412
Series Seed-2 preferred stock		4,751,218
Series A preferred stock		61,962,132
Series A-1 preferred stock		32,301,028
Options outstanding under stock incentive plan		21,060,965
Options outstanding outside of stock incentive plan		545,454
Option available for grant under stock incentive plan		21,284,453
Common stock warrants		1,250,000
Preferred stock warrants		2,596,303
Total		177,853,818

Co-Founder Divestment and Share Repurchase

In accordance with the NSA and pursuant to certain Repurchase Agreements entered into with the Company, effective as of June 8, 2021, each of Mr. Kokorich, Nortrone Finance S.A. and Brainyspace LLC (collectively “Co-Founders”) sold 100% of their respective equity interests in the Company on June 30, 2021. These equity interests consisted of Class B Common Stock (70,000,000 shares with par value of $70), FF Preferred Stock (20,000,000 shares with par value of $20), Series Seed Preferred Stock (13,759,298 shares with par value of $14), and Class A Common Stock Options (5,078,750 options). In exchange for these shares and options, the Company initially paid each entity $1, but will additionally pay up to an aggregate of $50,000,000, out of funds legally available therefor, to Mr. Kokorich, Nortrone Finance S.A. and Brainyspace LLC, on a pro rata basis, as follows: (i) an aggregate of $40,000,000 to be paid out of funds legally available therefor, within 10 business days after the earlier of (A) a business combination or capital raising transaction or series of transactions (whether in the form of debt or equity) resulting in cash proceeds of no less than $100,000,000 and (B) the Business Combination (the “First Payment Date”); and (ii) an aggregate of $10,000,000 to be paid out of funds legally available therefor, within 10 business days after a business combination or capital raising transaction or series of transactions (whether in the form of debt or equity) resulting in cash proceeds of no less than $250,000,000 (determined without any reduction for the $100,000,000 previously received in respect of the First Payment Date).

The Company recorded the initial consideration paid of $3 as treasury stock. Additionally, the Company evaluated the additional consideration to be paid as a liability under ASC 480 utilizing a probability-weighted approach to record the initial liability of $22,000,001 expected to be paid to the Co-Founders with a corresponding offset to treasury stock, as of June 30, 2021.

Stock Purchase Warrants

In February 2021, the Company entered into the Term Loan to provide the Company up to $40,000,000 of working capital. In conjunction with the Term Loan, warrants up to 1% of the fully diluted capitalization (including allowance for conversion of all outstanding convertible notes, SAFE notes and such warrants) of the Company were granted to the lender exercisable at the lender’s option. 80% of the 1% of the warrants were earned by the lender at the completion of the agreement. The remaining 20% of the warrants was forfeited as of June 30, 2021. The stock purchase warrant expires on June 30, 2031. The warrant’s original estimated fair value of $15,647,538 was recorded as a derivative liability under ASC 815, Derivatives and Hedging, with the offset recorded as a debt discount. The Company recorded the decrease in the estimated fair value of the warrant of $(4,056,962) and $(11,057,697) for the three and six months ended June 30, 2021, respectively, to reflect the value of the warrant of $4,589,843 as of June 30, 2021. The change was included in other income within the accompanying statements of operations. Additionally, there was an immaterial amount of deferred issuance costs allocated to the warrants.

In March 2020, the Company entered into the Equipment Loan to fund the acquisition of specific and eligible equipment. The financing agreement provides the Company access to borrow up to $4,500,000. (See Note 9). In conjunction with the equipment financing agreement, a stock purchase warrant was also issued to the lender, which allows for the purchase of 774,527 shares of Series A Preferred Stock or Preferred Stock in a subsequent round of financing in an amount of $225,000. Under the stock purchase warrant agreement, the lender is also provided the right to invest up to an additional $250,000 in the Company’s equity or convertible debt issued in future offerings, which the lender exercised in March 2021 upon the issuance of SAFE notes by the Company. The stock purchase warrant expires on March 9, 2030. The warrant was accounted for at its estimated fair value as a derivative liability because its features did not meet criteria for equity classification under ASC 815, Derivatives and Hedging. The valuation of the warrant was determined through the use of a Black Scholes options model, which the Company believes approximates its estimated fair value. The Company determined that the estimated fair value of the warrant at the issuance date was $29,415. The Company recorded the decrease in the estimated fair value of the warrant of $(397,362) and $(1,479,349) for the three and six months ended June 30, 2021, respectively, to reflect the value of the warrant of $1,726,835 as of June 30, 2021. The change was included in other income within the accompanying statements of operations. Additionally, there was an immaterial amount of deferred issuance costs allocated to the warrants.

Stock Incentive Plan

In May 2018, the board of directors of Momentus Inc. approved the 2018 Stock Plan (the “Initial Plan”) that allowed for granting of incentive and non-qualified stock options and restricted stock awards (“RSAs”) to employees, directors, and consultants. In November 2018, the board terminated the Initial Plan such that no additional awards may be granted under the Initial Plan, and adopted a new 2018 Stock Plan (the “New 2018 Stock Plan” and, together with the Initial Plan, the “Plans”). As of December 31, 2018, 30,975,958 shares of Class A common stock were reserved for issuance under the Plans. During the year ended December 31, 2019, the shares of Class A common stock reserved for issuance under the New 2018 Stock Plan was increased by 4,430,579. Vested options may be exercised in exchange for Class A common stock of the Company. All outstanding and unvested options and RSAs are forfeited in the event of employment termination.

In February and March 2020, the board approved an amendment and restatement to the New 2018 Stock Plan (the “Amended Plan and Restated 2018 Stock Plan”), and further amendments thereto that increased the number of shares that may be issued thereunder to 37,006,537 plus any additional shares, capped at 11,650,000, subject to awards outstanding as of October 30, 2018 and issued under the Initial Plan that are forfeited or repurchased by the Company. The Amended and Restated 2018 Stock Plan expires on October 30, 2028, unless terminated earlier.

Options and RSAs Under Stock Plans

Options issued under the Plans generally vest based on continuous service provided by the option holder over a four-year period. Compensation expense related to these options is recognized on a straight-line basis over the four-year period based upon the fair value at the grant date. The following table sets forth the summary of options activity for the six months ended June 30, 2021:

	Shares Available for Option Grants Under Plan	Options Outstanding Under Plan		Non-Plan Options	Total Options		Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding as of December 31, 2020	14,243,904	29,358,286		545,454	29,903,740		$	0.05	8.5	$	130,563,848
Vested exercised	—	(1,256,772	)	—	(1,256,772	)
Forfeitures	7,040,549	(7,040,549	)		(7,040,549	)
Outstanding as of June 30, 2021	21,284,453	21,060,965		545,454	21,606,419		$	0.06	6.8	$	52,835,067
Exercisable as of June 30, 2021					11,556,046		$	0.06	5.9	$	28,276,913
Vested and expected to vest as of June 30, 2021					21,606,419		$	0.06	6.8	$	52,835,067

Stock-based compensation expense related to options issued under the Plans was recorded within the Company’s statements of operations as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Research and development expenses	$	65,783	$	38,298	$	133,688	$	74,967
Selling, general and administrative expenses		2,278,371		128,835		7,978,316		193,709
	$	2,344,154	$	167,133	$	8,112,004	$	268,676

The intrinsic value of options exercisable as of June 30, 2021 and 2020 was $28,276,913 and $345,987, respectively. As of June 30, 2021, there was a total of $1,180,467 in unrecognized compensation cost related to unvested options, which is expected to be recognized over a weighted-average period of 2.16 years.

The assumptions used under the Black-Scholes-Merton option-pricing model and weighted average fair value of options on the grant date are as follows:

	Six Months Ended June 30,
	2021	2020
Expected term (in years)	N/A		5.12 – 6.07
Risk-free interest rate	N/A		0.34% – 1.35%
Expected volatility	N/A		34.00% – 45.68%
Dividend yield	N/A		0.00%
Fair value on grant date	N/A	$	0.08 – $0.22

Restricted Stock Awards

RSAs issued under the Plans generally vest based on continuous service provided by the restricted stockholder over a four-year period. Compensation expense related to these RSAs is recognized on a straight-line basis over the four-year period based upon the fair value at the grant date.

The following table sets forth the summary of RSA activity for the six months ended June 30, 2021:

	Restricted Shares			Weighted- Average Grant Date Fair Value Per Share		Weighted Average Remaining Vesting Period (in years)
Balance, December 31, 2020	$	177,084		$	0.01	0.70
Vested	$	(62,500	)	$	0.01
Balance, June 30, 2021	$	114,584		$	0.01	0.84

Common Stock purchased under the Plans are subject to certain restrictions and repurchase rights, including the right of first refusal by the Company for sale or transfer of shares to outside parties and other restrictions on transfers and secondary market transactions. As of June 30, 2021, 114,584 shares were subject to repurchase. Stock-based compensation expense related to RSAs issued under the Plans was recorded within the Company’s statements of operations as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Research and development expenses	$	104	$	763	$	417	$	2,499
Selling, general and administrative expenses		—		102		—		335
	$	104	$	865	$	417	$	2,834

As of June 30, 2021, there was a total of $1,042 in unrecognized compensation cost related to unvested RSAs, which is expected to vest over a weighted-average period of 0.84 years.

Stock Option Modifications

On May 22, 2021, in connection with the resignation of one of the Company’s former directors, the Company modified the outstanding awards, which resulted in the vesting of the options for 833,334 shares. The modified option award has an exercise price of $0.07 per share, expected term of one year, a risk-free rate of 0.04%, and expected volatility of 65.00% and no expected dividends. This Type III modification resulted in a remeasured fair value of $2.66 per share. The incremental compensation related to the accelerated options totaled $2,220,025.

On January 25, 2021, in connection with the resignation of the Company’s former Chief Executive Officer (“CEO”), Mikhail Kokorich, the Company modified his outstanding awards, which resulted in the vesting of options for 1,058,074 shares. The modified option awards have exercise prices ranging from $0.01 to $0.07 per share, expected term of one year, a risk-free interest rate of 0.10%, an expected volatility of 78.00% and no expected dividends. This Type III modification resulted in a remeasured fair value of $5.16 per share. The incremental compensation related to the accelerated options totaled $5,448,107.

On March 25, 2020, the Company modified option awards for eight employees, which resulted in the forfeiture of options for 970,833 shares and the vesting acceleration of options for 189,167 shares. The modified option awards have an exercise price of $0.07 per share, expected term of one year, a risk-free interest rate of 0.19%, an expected volatility of 41.00%, and no expected dividends. This Type III modification resulted in a re-measured fair value per share of $0.09. Compensation expense reversed due to the forfeitures was $4,631, and incremental compensation expense related to the accelerated options totaled $16,742.

On June 15, 2020, the Company modified an option award for an employee, which resulted in the vesting acceleration of 78,125 shares underlying such option award. This Type I modification resulted in incremental compensation expense of $703.

Compensation expense related to the above modifications was recorded in the accompanying statements of operations. Compensation expense totaling $9,845 was recorded in research and development expenses, and compensation expense totaling $2,970 was recorded in selling, general and administrative expenses.

On August 7, 2020, the Company modified an option award for an employee to change the vesting commencement date by one month. The impact to compensation expense from this Type I modification was immaterial.

interest rate of 0.12%, an expected volatility of 57.00%, and no expected dividends. The Type III modifications resulted in a re-measured fair value per share of $1.959. Compensation expense reversed due to the forfeiture was $21,003. Incremental compensation expense related to the accelerated options that was recognized on the modification date totaled $1,175,450. Incremental compensation expense recognized over a four-month period from the modification date totaled $783,637.

On October 5, 2020, the Company modified a restricted stock award for a consultant, which resulted in the vesting acceleration of 197,917 shares underlying such option award. This Type III modification resulted in incremental compensation expense of $399,594.

Income (Loss) Per Share

The following table sets forth the computation of basic and diluted net income (loss) per share:

Basic and Diluted Net Income (Loss) Per Share	Three Months Ended June 30,						Six Months Ended June 30,
Basic and Diluted Net Income (Loss) Per Share	2021			2020			2021			2020
Numerator:
Net income (loss)	$	64,327,154		$	(9,152,223	)	$	128,997,958		$	(15,406,868	)
Less:
Decrease in fair value of SAFE notes		(100,802,979	)		—			(182,366,571	)		—
Decrease in fair value of warrants and warrant amortization		(4,447,683	)		—			(12,528,951	)		—
Undistributed loss allocated to common stockholders for diluted net loss per share	$	(40,923,508	)	$	(9,152,223	)	$	(65,897,564	)	$	(15,406,868	)
Denominator:
Denominator for basic net income (loss) per share – weighted average shares outstanding		71,901,904			86,222,804			80,593,815			90,717,435
Dilutive preferred shares outstanding		131,116,643			—			131,116,643			—
Dilutive options and unvested stock units outstanding		20,634,514			—			20,813,808			—
Dilutive warrants outstanding		2,514,905			—			2,533,015			—
Dilutive SAFE notes outstanding (shares not reserved)		50,526,529			—			50,526,529			—
Denominator for diluted net income (loss) per share – adjusted weighted average shares outstanding		276,694,495			86,222,804			285,583,810			90,717,435

Net loss per share – diluted	$	(0.15	)	$	(0.11	)	$	(0.23	)	$	(0.17	)

Basic earnings per share is computed by dividing net income (loss) for the period by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing undistributed earnings allocated to common stockholders for the period by the weighted average number of common shares outstanding during the period, plus the dilutive effect of outstanding preferred shares, dilutive options and unvested stock units, and warrants outstanding pursuant to the treasury stock method.

For the three and six months ended June 30, 2021 and 2020, zero and 222.5 million shares, respectively, of outstanding preferred shares, dilutive options and unvested stock units, and warrants were excluded from the calculation of diluted earnings per share. The anti-dilutive stock options and shares of outstanding and unvested restricted stock were excluded from the computation of net loss per share for the three and six months ended June 30, 2020 due to the Company incurring a net loss for the periods.

Note 10. Stockholders’ Equity and Stock-based Compensation

Capital Structure

On November 1, 2018, the Company entered into exchange agreements with Mikhail Kokorich (its then current Chief Executive Officer, “CEO”) and a related entity of a co-founder (the Company’s two founding shareholders), whereby 100,000,000 fully vested shares of then-outstanding common stock were reconstituted into 80,000,000 shares of Class B common stock and 20,000,000 shares of FF preferred stock, with the Company’s CEO and the related entity each holding 40,000,000 shares of Class B common stock and 10,000,000 shares of FF preferred stock, respectively.

Concurrent with the exchange agreements, the parties to the agreements each entered into a stock restriction agreement whereby each holder’s 40,000,000 shares of Class B common stock were subjected to a 4-year vesting schedule, with 1/48th of the shares vesting on each monthly anniversary of the agreement, subject to the holder’s continuous service

through each vesting date. The CEO’s shares are also subject to acceleration in the event of a qualifying termination in connection with a change in control and the entity’s shares were subject to acceleration in the event of a qualifying termination. The Company has a right to repurchase any unvested shares at the then-current market value if the holder ceases to provide services. The related entity’s co-founder shares were subsequently accelerated and fully vested as of March 2020.

The Company assessed the repurchase feature and concluded that the shares met the criteria for equity classification as the Company’s exercise of the repurchase right is not probable. No additional expense was recognized as a result of the exchange as the fair value of the issued shares were not materially different from those exchanged.

In accordance with the Certificate of Incorporation, as amended and restated on June 21, 2019, the Company is authorized to issue four classes of stock: Class A Common, Class B Common, FF Preferred, and Preferred. As of December 31, 2020, the Company is authorized to issue 578,761,378 total shares with a par value of $0.000001 per share. A summary of the share classes is included below:

Preferred — Preferred stock consists of Series Seed Preferred, Series Seed-1 Preferred, Series Seed-2 Preferred, Series A Preferred, and Series A-1 Preferred. A summary of the Preferred stock shares designated, issued, and outstanding as of December 31, 2020 is as follows:

Preferred Stock	Shares Designated	Shares Issued and Outstanding	Liquidation Price		Dividend Rate
Series Seed Preferred	44,745,720	42,298,151	$	0.21392	$	0.01284
Series Seed-1 Preferred	3,563,412	3,563,412	$	0.14031	$	0.00842
Series Seed-2 Preferred	4,751,218	4,751,218	$	0.10524	$	0.00631
Series A Preferred	65,000,000	61,962,132	$	0.29050	$	0.01743
Series A-1 Preferred	32,301,028	32,301,028	$	0.23240	$	0.01394

Liquidation preference, conversion rights, redemption rights, and voting rights for Preferred stock are the same for each series. See below for a summary of these rights:

• Liquidation Preference — In the event of any voluntary or involuntary liquidation, dissolution or winding up of the Company or other deemed liquidation event (as specified in the Company’s Certificate of Incorporation), holders of preferred stock are entitled to receive, prior and in preference to holders of common stock and FF preferred stock, an amount per share equal to the greater of (i) the applicable original issue price for such series of convertible preferred stock, or (ii) such amount per share as would have been payable had all shares of preferred stock been converted into common stock. If upon occurrence of such a liquidation event, the assets and funds to be distributed among the holders of preferred stock are insufficient to permit the payment in full to all holders of preferred stock, the entire assets and funds of the Company legally available for distribution will be distributed ratably among such holders. Upon completion of the distribution to the holders of the preferred stock, all remaining legally available assets will be distributed ratably to the holders of common stock and FF preferred stock.

• Conversion Rights — At the option of the holder of preferred stock, each share of preferred stock may be converted at any time into such number of shares of Class A common stock at the applicable conversion rate, which is equal to the original issue price divided by a conversion price; the conversion price is initially equal to the original issue price, as adjusted for stock splits, dividends and distributions and for certain dilutive issuances. Each share of convertible preferred stock will automatically convert into Class A common stock upon either (i) the closing of a firm commitment underwritten public offering of the Company’s common stock pursuant to an effective registration statement on Form S-1 under the

Securities Act of 1933, as amended, that results in at least $75 million in gross proceeds to the Company or (ii) the affirmative vote by the holders of at least a majority of the outstanding shares of preferred stock, voting as a single class on an as-converted basis.

• Redemption Rights — Preferred stock is not redeemable at the option of the holder.

• Voting Rights — Preferred stock shareholders are entitled to one vote per share of Class A common stock that they would then convert into.

Shares of preferred stock are entitled to annual dividends if declared by the Board of Directors. No dividends were declared during the years ended December 31, 2020 and 2019.

FF Preferred — FF Preferred shareholders are entitled to one vote per share. Shares of FF preferred stock held by a holder are convertible into Class A common stock at the option of the holder, or upon any transfer that is neither made in connection with an equity financing nor authorized by the Board. Automatic conversion of all FF preferred stock into Class A common stock occurs upon a sale of the Company’s capital stock in an underwritten public offering, or by vote of a majority of the then outstanding shares of FF preferred stock. Dividends paid to holders of FF preferred stock are equivalent to those paid to Class A Common shareholders; however, there were no dividends paid for the years ended December 31, 2020 and 2019. FF preferred stock is not redeemable at the option of the holder.

Class A Common — Class A Common shareholders are entitled to one vote per share. Dividends paid to holders of Class A common stock are paid on a pro rata basis between the two classes of common stock; however, there were no dividends paid for the years ended December 31, 2020 and 2019. Class A common stock is not redeemable at the option of the holder.

Class B Common — Class B Common shareholders are entitled to ten votes per share. Dividends paid to holders of Class B common stock are paid on a pro rata basis between the two classes of common stock; however, there were no dividends paid for the years ended December 31, 2020 and 2019. Holders of Class B common stock may convert their shares to Class A common stock at their option. Class B common stock is not redeemable at the option of the holder.

The Company has reserved shares of Class A Common Stock for issuance for the following purposes as of December 31, 2020:

Series Seed preferred stock		42,298,151
Series Seed-1 preferred stock		3,563,412
Series Seed-2 preferred stock		4,751,218
Series A preferred stock		61,962,132
Series A-1 preferred stock		32,301,028
FF preferred common stock		20,000,000
Class B common stock		70,000,000
Options outstanding under stock incentive plan		29,358,286
Options outstanding outside of stock incentive plan		545,454
Option available for grant under stock incentive plan		14,243,904
Common stock warrants		1,250,000
Preferred stock warrants		774,527
Total		281,048,112

Stock Purchase Warrants

In March 2020, the Company entered into an equipment financing agreement to fund the acquisition of specific and eligible equipment. The financing agreement provides the Company access to borrow up to $4,500,000. (See Note 9). In conjunction with the equipment financing agreement, a stock purchase warrant was also issued to the lender, which allows for the purchase of 774,527 shares of Series A Preferred Stock (or, subject to certain conditions, Preferred

Stock in a subsequent round of financing) equal to $225,000 divided by the price per share in the applicable round of financing. Under the warrant agreement, the lender is also provided certain rights to invest up to an additional $250,000 in the Company’s equity or convertible debt issued in certain future offerings. The stock warrant expires on March 9, 2030 and is accounted for at fair value as a derivative liability. The valuation of the warrant was determined through the use of a Black Scholes options model, with a calculated fair value of $29,415 at the issuance date. The Company recorded the increase in the fair value of the warrant of $3,176,770 for the year ended December 31, 2020, in other income (expense) within the accompanying statements of operations. Additionally, there was an immaterial amount of deferred issuance costs allocated to the warrants.

Other Warrants

On January 1, 2019, the Company issued a warrant to an affiliate of an employee covering up to 5,000,000 shares of Class A common stock. The warrant has a contractual term of seven years, an exercise price of $0.05 per share, and had a grant date fair value of $0.019 per share. One quarter of the warrant shares vest and become exercisable after the first 12 months of continuous service by such employee, and 1/48 of the warrant shares vest and become exercisable each month of continuous service after the 12-month anniversary date.

On December 30, 2019, the Company modified the terms of the original warrant. A total of 1,250,000 warrant shares became immediately vested and the remaining 3,750,000 warrant shares were forfeited. The Company accounted for the modification as a Type III modification, which resulted in a re-measured fair value per share of $0.035 and the recognition of incremental compensation expense of $19,601. A total of $43,299 of compensation expense was recognized from the grant date through December 31, 2019 and is included within selling, general and administrative expenses in the accompanying statements of operations. The incremental compensation expense related to the warrant is recognized in selling, general and administrative expenses in the accompanying statements of operations. The fair value of the warrant was estimated using the Black-Scholes-Merton option pricing model with the following assumptions at each measurement date:

	December 30, 2019		January 1, 2019
Expected term (in years)	7.00		8.00
Risk-free interest rate	1.81	%	2.59	%
Expected volatility	32.97	%	27.72	%
Dividend yield	0.00	%	0.00	%

Stock Incentive Plan

In May 2018, the Board of Directors of Momentus Inc. approved the 2018 Stock Plan (the “Initial Plan”) that allowed for granting of incentive and non-qualified stock options and restricted stock awards (“RSAs”) to employees, directors, and consultants. In November 2018, the Board terminated the Initial Plan such that no additional awards may be granted under the Initial Plan and adopted a new 2018 Stock Plan (the “New 2018 Stock Plan” and, together with the Initial Plan, the “Plans”). As of December 31, 2018, 30,975,958 shares of Class A common stock were reserved for issuance under the Plans. During the year ended December 31, 2019, the shares of Class A common stock reserved for issuance under the New 2018 Stock Plan was increased by 4,430,579. Vested options may be exercised in exchange for Class A common stock of the Company. All outstanding and unvested options and RSAs forfeit in the event of employment termination.

In February and March 2020, the Board approved an amendment and restatement to the New 2018 Stock Plan (the “Amended Plan and Restated 2018 Stock Plan”), and further amendments thereto that increased the number of shares that may be issued thereunder to 37,006,537 plus any additional shares, capped at 11,650,000, subject to awards outstanding as of October 30, 2018 and issued under the Initial Plan that are forfeited to, or repurchased by the Company. The Amended and Restated 2018 Stock Plan expires on October 30, 2028, unless terminated earlier.

Option Outside of Stock Plan

The Company issued one option outside of the Plans in November 2019 exercisable into 545,454 shares of Class A Common Stock. The option was fully vested at issuance as no service period was required. Compensation expense totaling $12,803 was recognized in selling, general and administrative expenses in the accompanying statements of operations. The contractual term of the option is ten years. The grant date fair value of the option was $0.02 per share. The assumptions used under the Black-Scholes-Merton option-pricing model are as follows:

	2019
Expected term (in years)	5.00
Risk-free interest rate	1.62	%
Expected volatility	35.30	%
Dividend yield	0.00	%

There was no intrinsic value as the exercise price of the option was greater than the fair value of the Class A common stock. The option is fully exercisable as of December 31, 2020.

Options and RSAs Under Stock Plans

	Shares Available for Option Grants Under Plan		Options Outstanding Under Plan		Non-Plan Options	Total Options		Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding as of December 31, 2018	19,325,958		9,500,000		—	9,500,000		$	—	9.41	$	375,000
Authorized for issuance	4,430,579		—		—	—			—
Granted	(15,098,969	)	15,098,969		545,454	15,644,423			0.06
Outstanding as of December 31, 2019	8,657,568		24,598,969		545,454	25,144,423			0.04	9.12		681,779
Authorized for issuance	13,250,000								—
Granted	(15,137,861	)	15,137,861		—	15,137,861			0.07
Vested exercised	—		(2,904,347	)	—	(2,904,347	)		0.03
Forfeitures	7,474,197		(7,474,197	)	—	(7,474,197	)		0.06
Outstanding as of December 31, 2020	14,243,904		29,358,286		545,454	29,903,740		$	0.05	8.49	$	130,563,848
Exercisable as of December 31, 2020						12,697,969		$	0.04	8.09	$	55,573,549
Vested and expected to vest as of December 31, 2020						29,903,740		$	0.05	8.49	$	130,563,848

Stock-based compensation expense related to options issued under the Plans was as follows:

	Year Ended December 31,
	2020		2019
Research and development expenses	$	183,420	$	39,153
Selling, general and administrative expenses		2,581,371		25,869
	$	2,764,791	$	65,022

As of December 31, 2020, there was a total of $1,792,406 in unrecognized compensation cost related to unvested options, which is expected to be recognized over a weighted-average period of 2.37 years.

The assumptions used under the Black-Scholes-Merton option-pricing model and weighted average fair value of options on the grant date are as follows:

	Year Ended December 31,
	2020	2019
Expected term (in years)	5.03 – 6.23	5.85 – 6.08
Risk-free interest rate	0.27% – 1.36%	2.45% – 2.54%
Expected volatility	34.00% – 51.78%	31.20% – 31.53%
Dividend yield	0.00%	0.00%
Fair value on grant date	$0.08 – $1.16	$0.02

The Company utilized independent third-party valuation experts to determine inputs to the Black-Scholes model including estimates of current stock price and volatility.

Restricted Stock Awards

The following table sets forth the summary of RSA activity for the years ended December 31, 2020 and 2019:

	Restricted Shares		Weighted Average Grant Date Fair Value Per Share		Weighted Average Remaining Vesting Period (in years)
Balance, December 31, 2018	1,625,000		$	0.01	2.57
Vested	(787,500	)		0.01
Balance, December 31, 2019	837,500			0.01	1.91
Vested	(660,416	)		0.01
Balance, December 31, 2020	177,084		$	0.01	0.70

Common Stock purchased under the Plans are subject to certain restrictions and repurchase rights, including the right of first refusal by the Company for sale or transfer on new shares to outside parties and other restrictions on transfers and secondary market transactions. Repurchases of Common Stock are at zero cost. As of December 31, 2020, 177,084 shares were subject to repurchase. Stock-based compensation expense related to RSAs issued under the Plans was as follows:

	Year Ended December 31,
	2020		2019
Research and development expenses	$	4,099	$	5,373
Selling, general and administrative expenses		2,273		2,491
	$	6,372	$	7,864

As of December 31, 2020, there was a total of $1,667 in unrecognized compensation cost related to unvested RSAs, which is expected to vest over a weighted-average period of 1.33 years.

Stock Option Modifications

On March 25, 2020, the Company modified option awards for eight employees, which resulted in the forfeiture of options for 970,833 shares and the vesting acceleration of options for 189,167 shares. The modified option awards have an exercise price of $0.07 per share, expected term of one year, a risk-free interest rate of 0.19%, an expected volatility of 41.00%, and no expected dividends. This Type III modification resulted in a re-measured fair value per share of $0.09. Compensation expense reversed due to the forfeitures was $4,630, and incremental compensation expense related to the accelerated options totaled $16,742.

On September 24, 2020, the Company modified an option award for an employee, which resulted in the forfeiture of 4,000,000 shares underlying such option award, the vesting acceleration of 600,000 shares underlying such option award, and the continued vesting of 400,000 shares underlying such option award over a four-month period. This modified option award has an exercise price of $0.07 per share, expected term of approximately one year, a risk-free interest rate of 0.12%, an expected volatility of 57.00%, and no expected dividends. The Type III modifications resulted in a re-measured fair value per share of $2,029. Compensation expense reversed due to the forfeiture was $76,781. Incremental compensation expense related to the accelerated options that was recognized on the modification date totaled $1,175,450. Incremental compensation expense to be recognized over a four-month period from the modification date totaled $783,637.

401(k) Plan

The Company has established a 401(k) plan which covers all employees. Participants may make voluntary contributions to the plan subject to IRS limitation. The Company does not provide a matching contribution.

Stockholders' Equity and Stock-based Compensation [Line Items]

Stockholders’ Equity and Stock-based Compensation

NOTE 7. STOCKHOLDERS’ EQUITY

Preferred Stock — The Company is authorized to issue 1,000,000 shares of preferred stock with a par value of $0.0001 per share with such designations, voting and other rights and preferences as may be determined from time to time by the Company’s board of directors. As of June 30, 2021 and December 31, 2020, there were no shares of preferred stock issued or outstanding.

Common Stock

Class A Common Stock — The Company is authorized to issue 100,000,000 shares of Class A common stock with a par value of $0.0001 per share. Holders of Class A common stock are entitled to one vote for each share. As of June 30, 2021 and December 31, 2020, there were 6,379,970 and 6,668,084 shares of Class A common stock issued or outstanding, excluding 11,395,368 and 11,126,916 shares of common stock subject to possible redemption, respectively.

Class B Common Stock — The Company is authorized to issue 10,000,000 shares of Class B common stock with a par value of $0.0001 per share. Holders of Class B common stock are entitled to one vote for each share. As of June 30, 2021 and December 31, 2020, there were 4,312,500 shares of Class B common stock issued and outstanding.

Holders of Class A common stock and Class B common stock will vote together as a single class on all matters submitted to a vote of stockholders except as required by law.

Class B common stock shall convert into shares of Class A common stock will be adjusted (unless the holders of a majority of the outstanding shares of Class B common stock agree to waive such adjustment with respect to any such issuance or deemed issuance) so that the number of shares of Class A common stock issuable upon conversion of all shares of Class B common stock will equal, in the aggregate, on an as-converted basis, 20% of the sum of the total number of all shares of common stock outstanding upon the completion of the Initial Public Offering (not including the shares of Class A common stock underlying the Placement Units) plus all shares of Class A common stock and equity-linked securities issued or deemed issued in connection with a Business Combination (excluding any shares or equity-linked securities issued, or to be issued, to any seller in a Business Combination, any private placement-equivalent warrants issued, or to be issued, to any seller in a Business Combination, any private placement equivalent securities issued to the Sponsor or its affiliates upon conversion of loans made to the Company).

NOTE 7. STOCKHOLDERS’ EQUITY

Preferred Stock — The Company is authorized to issue 1,000,000 shares of preferred stock with a par value of $0.0001 per share with such designations, voting and other rights and preferences as may be determined from time to time by the Company’s board of directors. At December 31, 2020 and 2019, there were no shares of preferred stock issued or outstanding.

Class A Common Stock — The Company is authorized to issue 100,000,000 shares of Class A common stock with a par value of $0.0001 per share. Holders of Class A common stock are entitled to one vote for each share. At December 31, 2020 and 2019, there were 6,668,084 and 2,369,468 shares of Class A common stock issued or outstanding, excluding 11,126,916 and 15,425,532 shares of common stock subject to possible redemption, respectively.

Class B Common Stock — The Company is authorized to issue 10,000,000 shares of Class B common stock with a par value of $0.0001 per share. Holders of Class B common stock are entitled to one vote for each share. At December 31, 2020 and 2019, there were 4,312,500 shares of Class B common stock issued and outstanding.

Holders of Class A common stock and Class B common stock will vote together as a single class on all matters submitted to a vote of stockholders except as required by law.

The shares of Class B common stock will automatically convert into shares of Class A common stock at the time of a Business Combination on a one-for-one basis, subject to adjustment. In the case that additional shares of Class A common stock, or equity-linked securities, are issued or deemed issued in excess of the amounts offered in the Initial Public Offering and related to the closing of a Business Combination, the ratio at which shares of Class B common stock shall convert into shares of Class A common stock will be adjusted (unless the holders of a majority of the outstanding shares of Class B common stock agree to waive such adjustment with respect to any such issuance or deemed issuance) so that the number of shares of Class A common stock issuable upon conversion of all shares of Class B common stock will equal, in the aggregate, on an as-converted basis, 20% of the sum of the total number of all shares of common stock outstanding upon the completion of the Initial Public Offering (not including the shares of Class A common stock underlying the Placement Units) plus all shares of Class A common stock and equity-linked securities issued or deemed issued in connection with a Business Combination (excluding any shares or equity-linked securities issued, or to be issued, to any seller in a Business Combination, any private placement-equivalent warrants issued, or to be issued, to any seller in a Business Combination, any private placement equivalent securities issued to the Sponsor or its affiliates upon conversion of loans made to the Company).

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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Commitments and Contingencies	6 Months Ended	12 Months Ended
Commitments and Contingencies	Jun. 30, 2021	Dec. 31, 2020
Commitments and Contingencies [Line Items]
Commitments and Contingencies	Note 11. Commitments and Contingencies Legal Proceedings From time to time, we may be subject to various claims, lawsuits, and other legal and administrative proceedings that may arise in the ordinary course of business. Some of these claims, lawsuits, and other proceedings may range in complexity and result in substantial uncertainty; it is possible that they may result in damages, fines, penalties, non-monetary sanctions, or relief. However, we do not consider any such claims, lawsuits, or proceedings currently pending, individually or in the aggregate, to be material to our business or likely to result in a material adverse effect on our future operating results, financial condition, or cash flows. On July 15, 2021, a putative class action complaint was filed against the Company, SRAC and certain affiliates. See Note 14 for more information. SEC Investigation and CFIUS Review On January 24, 2021, the Company received a subpoena from the Division of Enforcement of the U.S. Securities and Exchange Commission (“Division of Enforcement”) requesting documents regarding the Registration Statement on Form S-4 and Amendment No. 1 thereto 1 (the “Registration Statement”) filed by SRAC in connection with the Business Combination. The Company entered into a settlement with the SEC on July 8, 2021. As a result of the settlement, in accordance with ASC 450, Contingencies, the Company recorded a contingency of $7.0 million. See Note 14 for additional information. In February 2021, the Company and the Company’s co-founder Mikhail Kokorich, with support from SRAC, submitted a joint notice to the Committee on Foreign Investment in the United States (“CFIUS”) for review of the historical acquisition of interests in the Company by Mr. Kokorich, his wife, and entities that they control in response to concerns of the U.S. Department of Defense regarding the Company’s foreign ownership and control. On June 8, 2021, CFIUS’ review of the joint notice relating to the historical acquisition of interests in Momentus by Mr. Kokorich, his wife, and entities that they control concluded when the Company entered into a National Security Agreement with Mr. Kokorich, on behalf of himself and Nortrone Finance S.A. (an entity controlled by Mr. Kokorich), Lev Khasis and Olga Khasis, each in their respective individual capacities and on behalf of Brainyspace LLC (an entity controlled by Olga Khasis), and the U.S. government represented by the U.S. Departments of Defense and the Treasury (the “NSA”). In accordance with the NSA, Mr. Kokorich, Nortrone Finance S.A., Lev Khasis and his wife Olga Khasis, and Brainyspace LLC fully divested all the Company’s securities beneficially owned by them by selling the securities back to the Company on June 8, 2021. The NSA also establishes various requirements and restrictions on the Company in order to protect national security, certain of which may materially and adversely affect the Company’s operating results due to the cost of compliance with security measures, and limitations on the Company’s control over certain U.S. facilities, contracts, personnel, vendor selection and operations. The Company had incurred legal expenses of approximately $3.5 million and $7.4 million during the three and six months ended June 30, 2021 and expects to continue to incur substantial legal expenses related to these matters in the future. SRAC Indemnity On June 29, 2021, Momentus entered into an amendment to the Merger Agreement which, among other things, provided that, should the Merger not occur for any reason, the Company would indemnify SRAC and its directors and officers (the “Indemnified Parties”) up to $10 million for certain losses, damages or liability actually incurred by the Indemnified Parties, excluding the payments made in relation to the SEC Settlement discussed in Note 14 — Subsequent Events. As of June 30, 2021, the Company did not record any contingency related to the indemnity agreement. Co-Founder Divestment The Company evaluated the additional consideration to be paid as a liability under ASC 480 utilizing a probability-weighted approach to record the initial liability of $22,000,001 expected to be paid to the Co-Founders as of June 30, 2021 as discussed in detail in Co-Founder Divestment and Share Repurchase section of Note 10.	Note 11. Commitments and Contingencies Legal Proceedings From time to time, the Company may become subject to legal proceedings, claims and litigation arising in the ordinary course of business. The Company is not currently a party to any legal proceedings, nor is it aware of any pending or threatened litigation, that would have a material adverse effect on the Company’s business, operating results, cash flows, or financing condition should such litigation be resolved unfavorably.
Stable Road Acquisition Corp [Member]
Commitments and Contingencies [Line Items]
Commitments and Contingencies	NOTE 6. COMMITMENTS AND CONTINGENCIES Risks and Uncertainties On July 13, 2021, the SEC announced charges against the Company, which resulted in a settlement with the SEC for $1 million. This amount was accrued for within the Company’s accompanying condensed consolidated balance sheet (see Note 10). Management continues to evaluate the impact of the COVID-19 pandemic on the industry and has concluded that while it is reasonably possible that the virus could have a negative effect on the Company’s financial position, results of its operations and/or search for a target company, the specific impact is not readily determinable as of the date of these consolidated financial statements. The consolidated financial statements do not include any adjustments that might result from the outcome of this uncertainty. Registration Rights Pursuant to a registration rights agreement entered into on November 7, 2019, the holders of the Founder Shares, Placement Units (including securities contained therein) and units (including securities contained therein) that may be issued upon conversion of Working Capital Loans, and any shares of Class A common stock issuable upon the exercise of the Placement Warrants and any shares of Class A common stock and warrants (and underlying Class A common stock) that may be issued upon conversion of the units issued as part of the Working Capital Loans and Class A common stock issuable upon conversion of the Founder Shares, are entitled to registration rights, requiring the Company to register such securities for resale (in the case of the Founder Shares, only after conversion to Class A common stock). The holders of the majority of these securities are entitled to make up to three demands, excluding short form demands, that the Company register such securities. In addition, the holders have certain “piggy-back” registration rights with respect to registration statements filed subsequent to the completion of a Business Combination and rights to require the Company to register for resale such securities pursuant to Rule 415 under the Securities Act. Notwithstanding the foregoing, Cantor may not exercise its demand and “piggyback” registration rights after five (5) and seven (7) years after the effective date of the registration statement and may not exercise its demand rights on more than one occasion. The Company will bear the expenses incurred in connection with the filing of any such registration statements. Underwriting Agreement The underwriter was paid a cash underwriting discount of $3,450,000, or $0.20 per Unit of the gross proceeds from the Units sold in the Initial Public Offering. In addition, the underwriter is entitled to a deferred fee of $0.40 per Unit of the gross proceeds from the Units sold in the Initial Public Offering, or $6,900,000 in the aggregate. The deferred fee will become payable to the underwriter from the amounts held in the Trust Account solely in the event that the Company completes a Business Combination, subject to the terms of the underwriting agreement.	NOTE 6. COMMITMENTS AND CONTINGENCIES Risks and Uncertainties Management continues to evaluate the impact of the COVID-19 pandemic and has concluded that while it is reasonably possible that the virus could have a negative effect on the Company’s financial position, results of its operations and/or completion of a business combination, the specific impact is not readily determinable as of the date of these financial statements. The financial statements do not include any adjustments that might result from the outcome of this uncertainty. Registration Rights Pursuant to a registration rights agreement entered into on November 7, 2019, the holders of the Founder Shares, Placement Units (including securities contained therein) and units (including securities contained therein) that may be issued upon conversion of Working Capital Loans, and any shares of Class A common stock issuable upon the exercise of the Placement Warrants and any shares of Class A common stock and warrants (and underlying Class A common stock) that may be issued upon conversion of the units issued as part of the Working Capital Loans and Class A common stock issuable upon conversion of the Founder Shares, are entitled to registration rights, requiring the Company to register such securities for resale (in the case of the Founder Shares, only after conversion to Class A common stock). The holders of the majority of these securities are entitled to make up to three demands, excluding short form demands, that the Company register such securities. In addition, the holders have certain “piggy-back” registration rights with respect to registration statements filed subsequent to the completion of a Business Combination and rights to require the Company to register for resale such securities pursuant to Rule 415 under the Securities Act. Notwithstanding the foregoing, Cantor may not exercise its demand and “piggyback” registration rights after five (5) and seven (7) years after the effective date of the registration statement and may not exercise its demand rights on more than one occasion. The Company will bear the expenses incurred in connection with the filing of any such registration statements. Underwriting Agreement The underwriter was paid a cash underwriting discount of $3,450,000, or $0.20 per Unit of the gross proceeds from the Units sold in the Initial Public Offering. In addition, the underwriter is entitled to a deferred fee of $0.40 per Unit of the gross proceeds from the Units sold in the Initial Public Offering, or $6,900,000 in the aggregate. The deferred fee will become payable to the underwriter from the amounts held in the Trust Account solely in the event that the Company completes a Business Combination, subject to the terms of the underwriting agreement. Legal Proceedings On December 3, 2020, a purported stockholder of the Company filed a complaint against the Company and its board of directors in the United States District Court for the Southern District of New York, in a case captioned Wallace v. Stable Road Acquisition Corp., et al., No. 1:20-cv-10193, alleging that the Company’s Registration Statement on Form S-4, originally filed with the SEC on November 2, 2020, omitted certain material information regarding the Proposed Transaction with Momentus, in violation of the securities laws. As relief, the complaint seeks an injunction barring the Company from proceeding with a stockholder vote with respect to, or consummating, the Proposed Transaction absent additional disclosures, as well as unspecified costs and damages. On December 9, 2020, another purported stockholder of the Company filed a complaint against the Company and its board of directors in the Supreme Court of the State of New York for the County of New York, in a case captioned Ciccotelli v. Stable Road Acquisition Corp., et al., No. 656895/2020, raising similar allegations and seeking similar relief as the complaint from the Wallace action. In January 2021, the SEC’s Division of Enforcement informed the Company that it was investigating certain disclosures made in filings with the SEC, including in connection with the Proposed Transaction. The Company is fully cooperating with the SEC’s investigation. The Company believes the outcome of these matters cannot be determined at this time.

Income Taxes

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Income Taxes [Line Items]

Note 12. Income Taxes

The Company’s effective tax rate for the six months ended June 30, 2021 and 2020 was zero percent. The effective tax rate may vary significantly from period to period and can be influenced by many factors. These factors include, but are not limited to, changes to the statutory rates in the jurisdictions where the Company has operations and changes in the valuation of deferred tax assets and liabilities. The difference between the effective tax rate and the federal statutory rate of 21% primarily relates to certain nondeductible items, state and local income taxes and a full valuation allowance for deferred tax assets.

Note 12. Income Taxes

	2020			2019
US	$	(307,027,145	)	$	(15,754,427	)
Total	$	(307,027,145	)	$	(15,754,427	)

The following are the components of the provision for income taxes for the years ended:

	2020		2019
Current:
State	$	800	$	800
Income tax provision	$	800	$	800

The following is a reconciliation of the statutory federal income tax rate to the Company’s effective tax rate for the years ended:

	2020		2019
Statutory tax rate	21.00	%	21.00	%
State taxes, net of federal benefit	1.03		8.44
Research and development credits	0.35		4.53
Non-deductible expenses	(18.43	)	(1.92	)
Valuation allowance	(3.86	)	(30.92	)
Uncertain tax positions	(0.09	)	—
Other	—		(1.13	)
Effective tax rate	0	%	0	%

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The following table presents the significant components of the Company’s deferred tax assets and liabilities as of the dates presented:

	December 31, 2020			December 31, 2019
Deferred tax assets:
Start-up and organization costs	$	4,280,464		$	1,624,196
Accrued expenses and reserves		503,840			—
Stock-based compensation		170,770			5,072
Tax credit carryforwards		2,340,468			937,893
Net operating loss		8,811,628			3,178,391
Property and equipment		288,656			132,878
Intangible assets		14,386			5,041
Capitalized R&D costs		566,973			—
Operating lease obligations		91,271			—
Warrants		888,975			—
Other		—			142,012
Total deferred tax assets before valuation allowance		17,957,431			6,025,483
Valuation allowance		(17,868,548	)		(6,025,483	)
Total deferred tax assets		88,883			—
Deferred tax liabilities:
Operating lease right-of-use assets		(88,439	)		—
Other		(444	)		—
Total deferred tax liabilities		(88,883	)		—
Net deferred tax assets	$	—		$	—

In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. As a result of a history of taxable losses and uncertainties as to future profitability, the Company recorded a full valuation allowance against its deferred tax assets. The valuation allowance for the year ended December 31, 2020 was $17,868,548.

As of December 31, 2020, the Company has federal and state net operating loss carryforwards (NOL) in the amount of $33,710,843 and $24,805,990, respectively. While the Federal NOLs can be carried forward indefinitely, California NOLs begin to expire in the year ending December 31, 2038. As of December 31, 2020, the Company had federal and California research and development credit carryforwards of $1,782,671 and $1,693,613, respectively. The federal research and development credit will begin to expire in the year ending December 31, 2038, and the California research and development credit has no expiration.

ASC Topic No. 740-10 requires companies to determine whether it is “more likely than not” that a tax position will be sustained upon examination by the appropriate taxing authorities before any tax benefit can be recorded in the financial statements. It also provides guidance on the recognition, measurement, classification and interest and penalties related to uncertain tax positions. The following table summarizes the activity related to the Company’s gross unrecognized tax benefits:

	Gross Unrecognized Tax Benefits
Balance at December 31, 2019	$	312,631
Increases related to prior tax positions		—
Increases related to current tax positions		467,526
Balance at December 31, 2020	$	780,157

The Company’s policy is to record estimated interest and penalties related to the underpayment of income taxes or unrecognized tax benefits as a component of its income tax provision. The Company has not recorded any interest or penalties related to unrecognized tax benefits through December 31, 2020.

In the normal course of business, the Company is subject to examination by federal and state jurisdictions where applicable based on the statute of limitations that apply in each jurisdiction. The tax return years 2017, 2018, 2019 and 2020 remain open to examination. The Company is not currently under audit by the taxing jurisdictions to which the Company is subject.

The Company does not anticipate any material change in its unrecognized tax benefits in the next 12 months.

The Company is in start-up phase and has not recognized revenue related to satisfying performance obligations as of December 31, 2020. Under section 195(b), all the expenses other than R&D, taxes and interest income/expense must be capitalized and amortized from the date the company starts active trade or business. As of December 31, 2020, section 195(b) costs accumulated an ending gross deferred tax asset (“DTA”) of $15,272,584.

The Company adopted Accounting Standards Update (“ASU”) 2016-02, Leases (“Topic 842” or “ASC 842”) on January 1, 2020., recognizing all leases, including operating leases, with a term of over 12 months on its balance sheets and to disclose key information about the Company’s leasing transactions. At the end of December 31, 2020, total DTA and deferred tax liability (“DTL”) from the three leases is $91,271 and $88,439, respectively.

Income Taxes [Line Items]

NOTE 9. INCOME TAX

The Company did not have any significant deferred tax assets or liabilities as of December 31, 2020 and 2019.

The Company’s net deferred tax assets are as follows:

	December 31,
	2020			2019
Deferred tax asset
Organizational costs/Startup expenses	$	763,877		$	24,483
Total deferred tax asset		763,877			24,483
Valuation allowance		(763,877	)		(24,483	)
Deferred tax asset, net of allowance	$	—		$	—

The income tax provision consists of the following:

	December 31,
	2020			2019
Federal
Current	$	178,866		$	47,567
Deferred		(739,394	)		(24,483	)

State
Current	$	—		$	—
Deferred		—			—
Change in valuation allowance		739,394			24,483
Income tax provision	$	178,866		$	47,567

As of December 31, 2020 and 2019, the Company did not have any U.S. federal and state net operating loss carryovers available to offset future taxable income.

In assessing the realization of the deferred tax assets, management considers whether it is more likely than not that some portion of all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which temporary differences representing net future deductible amounts become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment. After consideration of all of the information available, management believes that significant uncertainty exists with respect to future realization of the deferred tax assets and has therefore established a full valuation allowance. For the year ended December 31, 2020 and the period from May 28, 2019 (inception) through December 31, 2019, the change in the valuation allowance was $739,394 and $24,483, respectively.

A reconciliation of the federal income tax rate to the Company’s effective tax rate at for the year ended December 31, 2020 and for the period from May 28, 2019 (inception) through December 31, 2019 is as follows:

	December 31,
	2020		2019
Statutory federal income tax rate	21.0	%	21.0	%
Change in fair value of warrant liability	(19.7	)%	(23.9	)%
Transaction costs allocable to warrant liabilities	—		3.3	%
Change in valuation allowance	(1.7	)%	0.5	%
Income tax provision	(0.4	)%	0.9	%

The Company files income tax returns in the U.S. federal jurisdiction in various state and local jurisdictions and is subject to examination by the various taxing authorities.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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Related Party Transactions	6 Months Ended	12 Months Ended
Related Party Transactions	Jun. 30, 2021	Dec. 31, 2020
Related Party Transactions [Line Items]
Related Party Transactions	Note 13. Related Party Transactions The Company entered into a consulting and technology development agreement with an entity in which the Company’s former CEO has a material interest. Payments made to the entity totaled $101,910 and $393,260 for the three and six months ended June 30, 2020, respectively. There were no payments to the entity during the six months ended June 30, 2021. In March 2020, Brainyspace LLC, an entity affiliated with Lev Khasis, a co-founder of the Company, contributed 10,000,000 shares of Class B Common Stock back to the Company. In conjunction with the contribution, the Company agreed that if it re-hires Mr.Khasis within a specified time period, that he will receive an option to purchase 5,000,000 shares (on a pre-Business Combination basis), subject to the approval of the board. The Company has determined it will not re-hire Mr. Khasis so it will not be obligated to issue the option.	Note 13. Related Party Transactions The Company paid $187,500 in consulting fees to its former Chief Executive Officer (CEO) for the year ended December 31, 2019. The consulting fees were earned in lieu of regular payroll and were approved by the Board. For the year ended December 31, 2019, the Company purchased intangible assets consisting of intellectual property totaling $180,000 from an entity where the Company’s prior Chief Technology Officer was also the Chief Executive Officer. The Company entered into a consulting and technology development agreement with an entity in which the Company’s former CEO has a material interest. Payments made to the entity totaled $502,117 for the year ended December 31, 2020. In March 2020, a related entity of a co-founder of the Company contributed 10,000,000 shares of Class B Common Stock back to the Company. In conjunction with the contribution, the Company agreed that if it re-hires the co-founder within a specified time period, that co-founder will receive an option to purchase 5,000,000 shares (on a pre-Business Combination basis), subject to the approval of the Board.
Stable Road Acquisition Corp [Member]
Related Party Transactions [Line Items]
Related Party Transactions	NOTE 5. RELATED PARTY TRANSACTIONS Founder Shares In June 2019, the Sponsor purchased 4,312,500 shares (the “Founder Shares”) of the Company’s Class B common stock for an aggregate price of $25,000. The Founder Shares will automatically convert into shares of Class A common stock at the time of a Business Combination, or earlier at the option of the holders, on a one-for-one basis, subject to certain adjustments, as described in Note 7. The Founder Shares included up to 562,500 shares subject to forfeiture to the extent that the underwriter’s over-allotment option was not exercised in full or in part, so that the Sponsor would own, on an as-converted basis, 20% of the Company’s issued and outstanding shares after the Initial Public Offering (assuming the Sponsor did not purchase any Public Shares in the Initial Public Offering and excluding Placement Shares included in the Placement Units). As a result of the underwriter’s election to fully exercise its over-allotment option, the 562,500 Founder Shares are no longer subject to forfeiture. The Sponsor has agreed, subject to limited exceptions, not to transfer, assign or sell any of its Founder Shares until the earlier to occur of: (A) one year after the completion of a Business Combination or (B) subsequent to a Business Combination, (x) if the last sale price of the Class A common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after a Business Combination, or (y) the date on which the Company completes a liquidation, merger, capital stock exchange or other similar transaction that results in all of the Company’s stockholders having the right to exchange their shares of common stock for cash, securities or other property. On July 13, 2021, the Sponsor agreed to relinquish 250,000 Founder Shares pursuant to a settlement with the SEC (see Note 9, Subsequent Events). Related Party Loans On June 28, 2019, the Sponsor agreed to loan the Company an aggregate of up to $300,000 to cover expenses related to the Initial Public Offering pursuant to a promissory note (the “Promissory Note”). The Promissory Note was non-interest bearing and payable on the earlier of December 31, 2019 or the completion of the Initial Public Offering. Borrowings outstanding under the Promissory Note of $222,725 were repaid upon the consummation of the Initial Public Offering on November 13, 2019. The funds from the Promissory Note are no longer available to the Company. Promissory Notes On February 12, 2021, the Sponsor and an unrelated party each provided $300,000 in non-interest-bearing promissory notes for an aggregate balance of $600,000 that is payable at the consummation of a business combination. On June 25, 2021, the Sponsor and an unrelated party each provided an additional $21,500 in non-interest-bearing promissory notes for an aggregate balance of $43,000 that is payable at the consummation of a business combination. As of June 30, 2021, the full balance of $643,500 of the notes remains unpaid. Borrowings under the Promissory Notes are no longer available. In addition, in order to finance transaction costs in connection with a Business Combination, the Sponsor or an affiliate of the Sponsor, or certain of the Company’s officers and directors may, but are not obligated to, loan the Company funds as may be required (“Working Capital Loans”). If the Company completes a Business Combination, the Company would repay the Working Capital Loans out of the proceeds of the Trust Account released to the Company. Otherwise, the Working Capital Loans would be repaid only out of funds held outside the Trust Account. In the event that a Business Combination does not close, the Company may use a portion of proceeds held outside the Trust Account to repay the Working Capital Loans but no proceeds held in the Trust Account would be used to repay the Working Capital Loans. Except for the foregoing, the terms of such Working Capital Loans, if any, have not been determined and no written agreements exist with respect to such loans. The Working Capital Loans would either be repaid upon consummation of a Business Combination, without interest, or, at the lender’s discretion, up to $1,500,000 of such Working Capital Loans may be convertible into units upon consummation of the Business Combination at a price of $10.00 per unit. The units would be identical to the Placement Units. There were no outstanding borrowings under the Working Capital Loans as of June 30, 2021. Administrative Support Agreement The Company entered into an agreement whereby, commencing on November 8, 2019 through the earlier of the Company’s consummation of a Business Combination or its liquidation, the Company will pay an affiliate of the Sponsor a total of $10,000 per month for office space, utilities and administrative support. In January 2021, the Sponsor forgave the accrued administrative fees accrued at December 31, 2020 of $30,000 and agreed to not collect any fees for the six months ended June 30, 2021. As such, no administrative fees were incurred in 2021.	NOTE 5. RELATED PARTY TRANSACTIONS Founder Shares In June 2019, the Sponsor purchased 4,312,500 shares (the “Founder Shares”) of the Company’s Class B common stock for an aggregate price of $25,000. The Founder Shares will automatically convert into shares of Class A common stock at the time of a Business Combination, or earlier at the option of the holders, on a one-for-one basis, subject to certain adjustments, as described in Note 7. The Founder Shares included up to 562,500 shares subject to forfeiture to the extent that the underwriter’s over-allotment option was not exercised in full or in part, so that the Sponsor would own, on an as-converted basis, 20% of the Company’s issued and outstanding shares after the Initial Public Offering (assuming the Sponsor did not purchase any Public Shares in the Initial Public Offering and excluding Placement Shares included in the Placement Units). As a result of the underwriter’s election to fully exercise its over-allotment option, the 562,500 Founder Shares are no longer subject to forfeiture. The Sponsor has agreed, subject to limited exceptions, not to transfer, assign or sell any of its Founder Shares until the earlier to occur of: (A) one year after the completion of a Business Combination or (B) subsequent to a Business Combination, (x) if the last sale price of the Class A common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after a Business Combination, or (y) the date on which the Company completes a liquidation, merger, capital stock exchange or other similar transaction that results in all of the Company’s stockholders having the right to exchange their shares of common stock for cash, securities or other property. Administrative Support Agreement The Company entered into an agreement whereby, commencing on November 8, 2019 through the earlier of the Company’s consummation of a Business Combination or its liquidation, the Company will pay an affiliate of the Sponsor a total of $10,000 per month for office space, utilities and administrative support. For the year ended December 31, 2020 and the period from May 28, 2019 (inception) to December 31, 2019, the Company incurred $120,000 and $20,000 in fees for these services, respectively, of which $30,000 and $20,000, are included in accrued expenses in the accompanying consolidated balance sheets at December 31, 2020 and 2019, respectively. Related Party Loans On June 28, 2019, the Sponsor agreed to loan the Company an aggregate of up to $300,000 to cover expenses related to the Initial Public Offering pursuant to a promissory note (the “Promissory Note”). The Promissory Note was non-interest bearing and payable on the earlier of December 31, 2019 or the completion of the Initial Public Offering. Borrowings outstanding under the Promissory Note of $222,725 were repaid upon the consummation of the Initial Public Offering on November 13, 2019. In addition, in order to finance transaction costs in connection with a Business Combination, the Sponsor or an affiliate of the Sponsor, or certain of the Company’s officers and directors may, but are not obligated to, loan the Company funds as may be required (“Working Capital Loans”). If the Company completes a Business Combination, the Company would repay the Working Capital Loans out of the proceeds of the Trust Account released to the Company. Otherwise, the Working Capital Loans would be repaid only out of funds held outside the Trust Account. In the event that a Business Combination does not close, the Company may use a portion of proceeds held outside the Trust Account to repay the Working Capital Loans but no proceeds held in the Trust Account would be used to repay the Working Capital Loans. Except for the foregoing, the terms of such Working Capital Loans, if any, have not been determined and no written agreements exist with respect to such loans. The Working Capital Loans would either be repaid upon consummation of a Business Combination, without interest, or, at the lender’s discretion, up to $1,500,000 of such Working Capital Loans may be convertible into units upon consummation of the Business Combination at a price of $10.00 per unit. The units would be identical to the Placement Units. There were no outstanding borrowings under the Working Capital Loans as of December 31, 2020 and 2019.

Subsequent Events

6 Months Ended

Jun. 30, 2021

Subsequents Events [Abstract]

Subsequent Events

Note 14. Subsequent Events

Management of the Company has evaluated the impact of subsequent events through the date the condensed financial statements were available for issuance.

SEC Settlement

On July 13, 2021, the SEC announced charges against SRAC, Momentus, and Momentus’ founder and former CEO, Mikhail Kokorich, for misleading claims about Momentus’ technology and about national security risks associated with Mr. Kokorich. The SEC’s order found that Momentus violated scienter-based antifraud provisions of the federal securities laws and that SRAC violated negligence-based antifraud provisions of the federal securities laws as well as certain reporting and proxy solicitation provisions. The SEC also announced charges against the Sponsor and Brian Kabot. The order found that Mr. Kabot violated provisions of the federal securities laws related to proxy solicitations and that Mr. Kabot and the Sponsor caused SRAC’s violation of Section 17(a)(3) of the Securities Act of 1933. The SEC’s litigation is proceeding against Mr. Kokorich, against whom the SEC filed a complaint in the U.S. District Court for the District of Columbia. All parties except for Mr. Kokorich have settled with the SEC.

According to the SEC’s settled order Momentus and Mr. Kokorich misled SRAC investors, including PIPE investors in two respects. First, “Momentus and SRAC both claimed that in 2019, Momentus had ‘successfully tested’ in space its key technology, a microwave electro-thermal (“MET”) water plasma thruster, that Momentus claimed was designed to move a satellite into custom orbit after launch. In fact, that 2019 test failed to meet Momentus’s own public and internal pre-launch criteria for success, and was conducted on a prototype that was not designed to generate commercially significant amounts of thrust.” Second, the order found that Momentus and Mr. Kokorich also misrepresented the extent to which national security concerns involving Mr. Kokorich undermined Momentus’ ability to secure required governmental licenses essential to its operations. In addition, the order found that SRAC

repeated Momentus’ misleading statements in public filings associated with the Business Combination and failed its due diligence obligations to investors. According to the order, while SRAC claimed to have conducted extensive due diligence of Momentus, it never reviewed the results of Momentus’ in-space test or received sufficient documents relevant to assessing the national security risks posed by Mr. Kokorich. The order finds that Mr. Kabot participated in SRAC’s inadequate due diligence and in filing its inaccurate registration statements and proxy solicitations. The SEC’s complaint against Mr. Kokorich includes factual allegations that are consistent with the findings in the order.

Without admitting or denying the SEC’s findings, Momentus, SRAC, Mr. Kabot, and the Sponsor consented to an order requiring them to cease and desist from future violations. In the settlement with the SEC, Momentus will pay a civil penalty of $7.0 million, SRAC will pay a civil penalty of $1.0 million, and Mr. Kabot will pay a civil penalty of $40,000. In addition, the Sponsor has agreed to forfeit 250,000 founders’ shares it would otherwise have received upon consummation of the Business Combination; and Momentus has agreed to undertakings requiring enhancements to its disclosure controls, including the creation of an independent board committee and retention of an internal compliance consultant for a period of two years.

In addition, pursuant to the SEC’s settled order described above, which was announced on July 13, 2021, Momentus and SRAC agreed to provide the original investors in the private placement of the Combined Company’s Class A shares that were issued at the time of the Business Combination (the “PIPE Investors”) with the right to terminate their subscription agreements prior to the stockholder vote to approve the proposed Business Combination. Accordingly, Momentus and SRAC provided all PIPE Investors with the option to terminate their subscription agreements without any liability or obligation. In total, PIPE Investors representing $118.0 million of the original PIPE investment terminated their subscription agreements. The remaining PIPE Investors elected to continue with their subscription agreements, with certain PIPE Investors increasing or decreasing their commitment amounts pursuant to amendments to the subscription agreements, with such changes representing a net $5.3 million increase in commitments by such remaining PIPE Investors. In addition, six new PIPE Investors, including entities related Prime Movers Lab, an affiliate of the Company, entered into subscription agreements, representing approximately $47.75 million of new commitments. Affiliates of SRC-NI Holdings, LLC, the sponsor of SRAC, which had committed $15.0 million in the aggregate to the PIPE Investment, reaffirmed their commitment.

Putative Class Action Lawsuits

On July 15, 2021, a purported stockholder of SRAC filed a putative class action complaint against the Company, Sponsor, Brian Kabot, James Norris, Momentus, and Mikhail Kokorich in the United States District Court for the Central District of California, in a case captioned Jensen v. Stable Road Acquisition Corp., et al., No. 2:21-cv-05744. The complaint alleges that the defendants omitted certain material information in their public statements and disclosures regarding the Proposed Transaction in violation of the securities laws, and seeks damages on behalf of a putative class of stockholders who purchased SRAC stock between October 7, 2020 and July 13, 2021. On July 22, 2021 and August 4, 2021, purported stockholders filed putative class action complaints in the same court, in cases captioned Hall v. Stable Road Acquisition Corp., et al. No. 2:21-cv-05943 and Depoy v. Stable Road Acquisition Corp., et al., No. 2:21-cv-06287, asserting substantially similar claims and seeking substantially similar relief. Pursuant to statute, the Jensen, Hall and Depoy actions will be consolidated into a single proceeding and a lead plaintiff and lead counsel appointed to represent the putative class. The Company believes that it has viable defenses to the claims asserted and intends to defend the cases vigorously. Other, similar suits may follow.

Business Combination Stockholder Vote

On August 11, 2021, SRAC stockholders approved the Business Combination and the proposed merger was completed on August 12, 2021. Approximately 3.5 million shares were submitted for redemption, resulting in approximately $35.4 million of returned funds and net cash proceeds of $247.3 million.

As the cash proceeds from the Business Combination were at least $100,000,000 but less than $250,000,000, the Combined Company is required to pay, out of funds legally available therefor, an aggregate of $40 million to the Co-Founders, within 10 days following the completion of the Business Combination, as described in Note 10. When paid, this amount will settle the contingency discussed in Note 11 and will increase the value recorded as Treasury Stock.

Subsequent Events	6 Months Ended	12 Months Ended
Subsequent Events	Jun. 30, 2021	Dec. 31, 2020
Subsequent Events [Line Items]
Subsequent Events	Note 14. Subsequent Events On January 25, 2021, a co-founder of the Company and CEO resigned from the Company. As part of the terms of the former CEO’s separation agreement, the Company accelerated all his unvested shares and options and extended the post-termination exercise period for his options from 3 months to 12 months from the date of termination. An interim CEO has been appointed while the Company conducts a search for a new permanent CEO. In January 2021, the Company commenced a new lease at a new location in San Jose, California. The lease expires in February 2028. The Company is obligated to pay approximately $11 million over the term of the lease. On February 22, 2021, the Company entered into a Loan and Security Agreement (“LSA”) and related agreements with Venture Lending & Leasing IX, Inc. The LSA provides for an initial $25,000,000 growth capital term loan that is available to the Company upon closing of the agreement, and which the Company expects to draw down on March 1, 2021. The LSA also includes an additional $15,000,000 growth capital term loan that is available to the Company through June 30, 2021 contingent upon the Company receiving from the FAA payload approval and the Company closing a minimum of $25,000,000 in additional equity. The LSA provides for a 12% annual interest rate, monthly payment of interest only for the first 12 months, and payment in full of all outstanding principal and interest on March 1, 2022. At the Company’s option prior to February 15, 2022, the repayment of the full principal amount outstanding and due on March 1, 2022 may be extended for either 12 or 24 months and amortized in equal monthly payments. The LSA grants the lender the first security priority lien on substantially all assets of the Company (subject to certain exceptions, including that the lien on IP will be a springing lien based on the occurrence of certain events) for all periods of time that the Company is indebted to the lender. In conjunction with the LSA, the lender will receive warrants for preferred stock equal to up to 1% of the Company’s fully diluted capitalization (including allowance for conversion of all outstanding convertible notes, SAFE notes and such warrants). The warrants are earned and vest 80% upon signing of the agreement, 10% upon qualification for the incremental $15,000,000 growth capital term loan and 10% upon the Company’s utilizing such incremental growth capital term loan. The exercise price of the warrants is an aggregate of $1,000. In addition, the lender will have certain rights to participate in future private equity offerings (including convertible notes or bridge financings) of the Company. Management of the Company has evaluated the impact of subsequent events through February 23, 2021, the date the financial statements were available for issuance.	NOTE 11. SUBSEQUENT EVENTS The Company evaluated subsequent events and transactions that occurred after the balance sheet date up to the date that the consolidated financial statements were issued. Based upon this review, other than as described below and in Note 2, the Company did not identify subsequent events that would have required adjustment or disclosure in the consolidated financial statements. In February 2021, Stable Road Capital LLC and DIBALYD Investments, an affiliate of Nala Investments, each loaned $300,000 to the Company pursuant to non-interest bearing promissory notes in order to finance transaction and working capital costs. The promissory notes mature upon the earlier of June 30, 2021 or the consummation of the Company’s initial Business Combination.
Stable Road Acquisition Corp [Member]
Subsequent Events [Line Items]
Subsequent Events	NOTE 10. SUBSEQUENT EVENTS The Company evaluated subsequent events and transactions that occurred after the balance sheet date up to the date that the condensed consolidated financial statements were issued. Based upon this review, other than described below, the Company did not identify subsequent events that would have required adjustment or disclosure in the condensed consolidated financial statements. SEC Settlement On July 13, 2021, the SEC announced charges against the Company, Momentus, and Momentus’s founder and former CEO, Mikhail Kokorich, for misleading claims about Momentus’s technology and about the U.S. government’s national security concerns about Mr. Kokorich. The SEC’s settled order finds that Momentus and Mr. Kokorich knowingly or recklessly made misrepresentations of material fact and misleading omissions in violation of antifraud provisions of U.S. federal securities laws, and that the Company negligently made misrepresentations of material fact and misleading omissions in violation of antifraud provisions of U.S. federal securities laws, as well as related reporting and proxy solicitation provisions. The SEC also announced charges against the Sponsor and Brian Kabot, finding that Mr. Kabot negligently violated provisions of U.S. federal securities laws related to proxy solicitations and that Mr. Kabot and the Sponsor caused the Company’s violation of negligence-based antifraud provisions of the federal securities laws. Without admitting or denying the SEC’s findings, Momentus, the Company, Mr. Kabot, and the Sponsor consented to an order requiring them to cease and desist from future violations. Momentus will pay a civil penalty of $7.0 million, the Company will pay a civil penalty of $1.0 million, and Mr. Kabot will pay a civil penalty of $40,000. Momentus and the Company have also agreed to provide PIPE investors with the right to terminate their Subscription Agreements prior to the stockholder vote to approve the Proposed Transaction; the Sponsor has agreed to relinquish 250,000 founders’ shares it would otherwise have received upon consummation of the Proposed Transaction; and Momentus has agreed to undertakings requiring enhancements to its disclosure controls, including the creation of an independent board committee and retention of an internal compliance consultant for a period of two years. The $1.0 million civil penalty is included in accounts payable and accrued expenses within the accompanying condensed consolidated balance sheets as of June 30, 2021. Stockholder Litigation and Demands On December 3, 2020, a complaint was filed by a purported stockholder of the Company against the Company and its board of directors in the United States District Court for the Southern District of New York, in a case captioned Wallace v. Stable Road Acquisition Corp., et al., No. 1:20-cv-10193. The complaint alleges that the Company’s Registration Statement, as filed on November 2, 2020, omitted certain material information regarding the Company’s planned transaction with Momentus, in violation of the securities laws. As relief, the complaint seeks an injunction barring the Company from proceeding with a stockholder vote or consummating the transaction absent additional disclosures, as well as unspecified costs and damages. A second complaint was filed by another purported stockholder of the Company against the Company and its board of directors in the Supreme Court of the State of New York for the County of New York, in a case captioned Ciccotelli v. Stable Road Acquisition Corp., et al., No. 656895/2020, on December 9, 2020, raising similar allegations and seeking similar relief. In addition to the two complaints, the Company received three letters, dated November 9, 2020, November 19, 2020, and August 3, 2021, respectively, from purported stockholders raising similar allegations. On July 15, 2021, a purported stockholder of the Company filed a putative class action complaint against the Company, the Sponsor, Brian Kabot, James Norris, Momentus, and Mikhail Kokorich in the United States District Court for the Central District of California, in a case captioned Jensen v. Stable Road Acquisition Corp., et al., No. 2:21-cv-05744. The complaint alleges that the defendants omitted certain material information in their public statements and disclosures regarding the Proposed Transaction, in violation of the securities laws, and seeks damages on behalf of a putative class of stockholders who purchased the Company’s stock between October 7, 2020 and July 13, 2021. On July 22, 2021, and August 4, 2021, respectively, two other purported stockholders filed putative class action complaints in the same court, in cases captioned Hall v. Stable Road Acquisition Corp., et al., No. 2:21-cv-05943, and Depoy v. Stable Road Acquisition Corp., et al., No. 2:21-cv-06287, asserting substantially similar claims and seeking substantially similar relief. Other, similar suits may follow. On July 20, 2021, a purported stockholder of the Company sent a letter demanding that the Company provide holders of the Company’s Class A Common Stock with a separate class vote on the Class A Share Increase Amendment. The Company has responded to this stockholder in writing to explain its view that the demand is without merit.’

Description of Organization and Business Operations	6 Months Ended	12 Months Ended
Description of Organization and Business Operations	Jun. 30, 2021	Dec. 31, 2020
Stable Road Acquisition Corp [Member]
Description of Organization and Business Operations [Line Items]
DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS	NOTE 1. DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS Stable Road Acquisition Corp. (the “Company” or “SRAC”) is a blank check company incorporated in Delaware on May 28, 2019. The Company was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses (the “Business Combination”). The Company is an early stage and emerging growth company and, as such, the Company is subject to all of the risks associated with early stage and emerging growth companies. The Company has two subsidiaries, Project Marvel First Merger Sub, Inc., a wholly-owned subsidiary of the Company incorporated in Delaware on September 29, 2020 (“First Merger Sub”) and Project Marvel Second Merger Sub, LLC, a wholly-owned subsidiary of the Company incorporated in Delaware on September 29, 2020 (“Second Merger Sub”). First Merger Sub and Second Merger Sub were formed in connection with the proposed business combination with Momentus Inc., a Delaware corporation (“Momentus”), as more fully discussed below. As of June 30, 2021, the Company had not commenced any operations. All activity through June 30, 2021 relates to the Company’s formation, the initial public offering (“Initial Public Offering”), which is described below, identifying a target company for a Business Combination, and the proposed business combination with Momentus, as more fully discussed below. The Company will not generate any operating revenues until after the completion of its initial Business Combination, at the earliest. The Company generates non-operating income in the form of interest income from the proceeds derived from the Initial Public Offering. The registration statement for the Company’s Initial Public Offering was declared effective on November 7, 2019. On November 13, 2019, the Company consummated the Initial Public Offering of 17,250,000 units (the “Units” and, with respect to the shares of common stock included in the Units sold, the “Public Shares”), which includes the full exercise by the underwriter of the over-allotment option to purchase an additional 2,250,000 Units, at $10.00 per Unit, generating gross proceeds of $172,500,000, which is described in Note 3. Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of 545,000 units (the “Placement Units”) at a price of $10.00 per Placement Unit in a private placement to SRC-NI Holdings, LLC, a Delaware limited liability company (the “Sponsor”), and Cantor Fitzgerald& Co. (“Cantor”), the underwriter of the Initial Public Offering, generating gross proceeds of $5,450,000, which is described in Note 4. Transaction costs amounted to $10,924,857, consisting of $3,450,000 of underwriting fees, $6,900,000 of deferred underwriting fees and $574,857 of other offering costs. Following the closing of the Initial Public Offering on November 13, 2019, an amount of $172,500,000 ($10.00 per Unit) from the net proceeds of the sale of the Units in the Initial Public Offering and the sale of the Placement Units was placed in a trust account (“Trust Account”) and invested only in U.S. government securities, within the meaning set forth in Section 2(a)(16) of the Investment Company Act, with a maturity of 180 days or less or in any open-ended investment company that holds itself out as a money market fund selected by the Company meeting the conditions of Rule 2a-7 of the Investment Company Act of 1940, as amended (the “Investment Company Act”), as determined by the Company, until the earlier of: (i) the completion of a Business Combination and (ii) the distribution of the Trust Account, as described below. The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Initial Public Offering and the sale of the Placement Units, although substantially all of the net proceeds are intended to be applied generally toward consummating a Business Combination. There is no assurance that the Company will be able to complete a Business Combination successfully. The Company must complete one or more initial Business Combinations having an aggregate fair market value of at least 80% of the assets held in the Trust Account (excluding the deferred underwriting commissions and taxes payable on interest earned on the Trust Account) at the time of the agreement to enter into the initial Business Combination. The Company will only complete a Business Combination if the post-transaction company owns or acquires 50% or more of the outstanding voting securities of the target or otherwise acquires a controlling interest in the target sufficient for it not to be required to register as an investment company under the Investment Company Act. The Company will provide holders of the outstanding Public Shares (the “Public Stockholders”) with the opportunity to redeem all or a portion of their Public Shares upon the completion of a Business Combination either (i) in connection with a stockholder meeting called to approve the Business Combination or (ii) by means of a tender offer. The decision as to whether the Company will seek stockholder approval of a Business Combination or conduct a tender offer will be made by the Company, solely in its discretion. The Public Stockholders will be entitled to redeem their Public Shares for a pro rata portion of the amount then in the Trust Account ($10.00 per Public Share, plus any pro rata interest earned on the funds held in the Trust Account and not previously released to the Company to pay its tax obligations, less up to $100,000 of interest to pay dissolution expenses). The per-share amount to be distributed to Public Stockholders who redeem their Public Shares will not be reduced by the deferred underwriting commissions the Company will pay to the underwriter (as discussed in Note 6). There will be no redemption rights upon the completion of a Business Combination with respect to the Company’s warrants. The Company will proceed with a Business Combination if the Company has net tangible assets of at least $5,000,001 either immediately prior to or upon such consummation of a Business Combination and, if the Company seeks stockholder approval, a majority of the shares voted are voted in favor of the Business Combination. If a stockholder vote is not required by law and the Company does not decide to hold a stockholder vote for business or other legal reasons, the Company will, pursuant to its Amended and Restated Certificate of Incorporation (the “Amended and Restated Certificate of Incorporation”), conduct the redemptions pursuant to the tender offer rules of the U.S. Securities and Exchange Commission (“SEC”) and file tender offer documents with the SEC prior to completing a Business Combination. If, however, stockholder approval of the transaction is required by law, or the Company decides to obtain stockholder approval for business or legal reasons, the Company will offer to redeem shares in conjunction with a proxy solicitation pursuant to the proxy rules and not pursuant to the tender offer rules. If the Company seeks stockholder approval in connection with a Business Combination, the Company’s Sponsor has agreed to vote its Founder Shares (as defined in Note 5), Placement Shares (as defined in Note 4) and any Public Shares purchased during or after the Initial Public Offering in favor of approving a Business Combination. Additionally, each Public Stockholder may elect to redeem their Public Shares irrespective of whether they vote for or against the proposed transaction. If the Company seeks stockholder approval of a Business Combination and it does not conduct redemptions pursuant to the tender offer rules, the Amended and Restated Certificate of Incorporation provides that a Public Stockholder, together with any affiliate of such stockholder or any other person with whom such stockholder is acting in concert or as a “group” (as defined under Section 13 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), will be restricted from redeeming its shares with respect to more than an aggregate of 15% or more of the Public Shares, without the prior consent of the Company. The Sponsor has agreed (a) to waive its redemption rights with respect to its Founder Shares, Placement Shares and Public Shares held by it in connection with the completion of a Business Combination and (b) not to propose an amendment to the Amended and Restated Certificate of Incorporation (i) that would affect the substance or timing of the Company’s obligation to redeem 100% of its Public Shares if the Company does not complete a Business Combination or (ii) with respect to any other provision relating to stockholders’ rights or pre-business combination activity, unless the Company provides the Public Stockholders with the opportunity to redeem their Public Shares in conjunction with any such amendment. The Company will have until August 13, 2021 to complete a Business Combination (the “Combination Period”), including the proposed business combination with Momentus. However, if the Company is unable to complete a Business Combination within the Combination Period, it will (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account including interest earned on the funds held in the Trust Account and not previously released to the Company to pay its tax obligations (less up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding Public Shares, which redemption will completely extinguish Public Stockholders’ rights as stockholders (including the right to receive further liquidating distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining stockholders and the Company’s board of directors, dissolve and liquidate, subject in each case to the Company’s obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law. There will be no redemption rights or liquidating distributions with respect to the Company’s warrants, which will expire worthless if the Company fails to complete a Business Combination within the Combination Period. The Sponsor has agreed to waive its liquidation rights with respect to the Founder Shares and (along with Cantor) Placement Shares if the Company fails to complete a Business Combination within the Combination Period. However, if the Sponsor acquires Public Shares after the Initial Public Offering, such Public Shares will be entitled to liquidating distributions from the Trust Account if the Company fails to complete a Business Combination within the Combination Period. The underwriter has agreed to waive its rights to its deferred underwriting commission (see Note 6) held in the Trust Account in the event the Company does not complete a Business Combination within the Combination Period and, in such event, such amounts will be included with the other funds held in the Trust Account that will be available to fund the redemption of the Public Shares. In the event of such distribution, it is possible that the per share value of the assets remaining available for distribution will be less than the Initial Public Offering price per Unit ($10.00). In order to protect the amounts held in the Trust Account, the Sponsor has agreed to be liable to the Company if and to the extent any claims by a third party for services rendered or products sold to the Company, or a prospective target business with which the Company has entered into a written letter of intent, confidentiality or similar agreement or business combination agreement, reduce the amount of funds in the Trust Account to below the lesser of (i) $10.00 per Public Share and (ii) the actual amount per Public Share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per share due to reductions in the value of the trust assets less taxes payable. This liability will not apply with respect to any claims by a third party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) or to any claims under the Company’s indemnity of the underwriter of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). The Company will seek to reduce the possibility that the Sponsor will have to indemnify the Trust Account due to claims of creditors by endeavoring to have all vendors, service providers, prospective target businesses or other entities with which the Company does business, execute agreements with the Company waiving any right, title, interest or claim of any kind in or to monies held in the Trust Account. The Company’s independent registered public accounting firm and the underwriter of the Initial Public Offering will not execute agreements with the Company waiving such claims to the monies held in the Trust Account. Proposed Business Combination with Momentus Inc. On October 7, 2020, SRAC entered into an Agreement and Plan of Merger, as amended on March 5, 2021, April 6, 2021 and June 29, 2021 (as it may be further amended and/or restated from time to time, the “Merger Agreement”), by and among SRAC, Project Marvel First Merger Sub, Inc., a Delaware corporation and wholly-owned subsidiary of SRAC (“First Merger Sub”), and Project Marvel Second Merger Sub, LLC, a Delaware limited liability company and wholly-owned subsidiary of SRAC (“Second Merger Sub”), and Momentus Inc., a Delaware corporation (“Momentus”), pursuant to which, among other things: (a) First Merger Sub will merge with and into Momentus (“First Merger”), with Momentus being the surviving corporation of the First Merger and (b) immediately following the First Merger and as part of the same overall transaction as the First Merger, Momentus will merge with and into Second Merger Sub (the “Second Merger” and, together with the First Merger, the “Mergers”), with Second Merger Sub being the surviving company of the Second Merger. The Merger Agreement, the Mergers and the other transactions contemplated by the Merger Agreement are referred to herein as the “Proposed Transaction.” Pursuant to the Merger Agreement, the aggregate merger consideration payable to the equityholders of Momentus will be paid in equity consideration equal to $566,600,000, minus Momentus’ indebtedness for borrowed money as of the closing of the Mergers (the “Closing”), plus the amount of Momentus’ cash and cash equivalents (excluding restricted cash as determined in accordance with GAAP, any cash being held on behalf of Momentus’ customers and any security deposits for leases) as of the Closing, plus the aggregate exercise price of all outstanding options and warrants (the “Merger Consideration”). The Merger Consideration payable to the stockholders of Momentus will be paid in shares of newly issued Class A common stock of SRAC, with a deemed value of $10 per share. In addition, SRAC will pay off, or cause to be paid off, on behalf of Momentus and in connection with the Closing, Momentus’ outstanding indebtedness for borrowed money. In connection with the Proposed Transaction, each share of Momentus’ capital stock (subject to limited exceptions) will be cancelled and automatically deemed for all purposes to represent the right to receive a portion of the Merger Consideration in accordance with Momentus’ organizational documents. In addition, the Merger Consideration that is paid with respect to any shares of Momentus’ capital stock that is subject to any vesting restrictions or other conditions shall continue to be subject to such vesting restrictions and conditions after the Closing. Each option of Momentus that is outstanding and unexercised immediately prior to the Closing (whether vested or unvested) will be automatically assumed by SRAC and converted into an option to acquire an adjusted number of shares of Class A common stock at an adjusted exercise price per share and will continue to be governed by substantially the same terms and conditions (including vesting and exercisability terms) as were applicable to the corresponding former option. Each warrant to purchase shares of capital stock of Momentus that is outstanding and unexercised immediately prior to the Closing will be automatically converted into a warrant to acquire an adjusted number of shares of Class A common stock at an adjusted exercise price per share and will continue to be governed by substantially the same terms and conditions (including applicable vesting conditions) as were applicable to the corresponding former warrant. Consummation of the Proposed Transaction is subject to customary closing conditions for special purpose acquisition companies, including the following conditions to each party’s obligations, among others: (a) approval by SRAC’s stockholders and Momentus’ stockholders, (b) SRAC having at least $5,000,001 of net tangible assets as of the effective time of the consummation of the Mergers, and (c) the approval of the listing of the shares of Class A common stock to be issued in connection with the Closing on The Nasdaq Stock Market LLC and the effectiveness of a Registration Statement on Form S-4. The Merger Agreement may be terminated under certain customary and limited circumstances prior to the consummation of the Mergers. On October 7, 2020 and July 15, 2021, the Company entered into Subscription Agreements (as amended from time to time, the “Subscription Agreements”) with certain investors (the “PIPE Investors”) pursuant to which the investors have agreed to purchase an aggregate of 11,000,000 shares of Class A common stock in a private placement for $10.00 per share (the “Private Placement”). The Subscription Agreements also contemplate that the Company will issue to each PIPE Investor warrants to purchase one share of the Company’s Class A common stock at a price of $11.50 per share (subject to adjustment as described in the warrant agreement) for each share of Class A common stock purchased pursuant to such PIPE Investor’s Subscription Agreement. The proceeds from the Private Placement will be used to for general working capital purposes following the closing. The closing of the transactions contemplated by the Subscription Agreements is contingent upon, among other customary closing conditions, the substantially concurrent consummation of the Proposed Transaction. Concurrently with the execution of the Merger Agreement, an investor of Momentus, the Company and Momentus entered into a repurchase agreement (the “Repurchase Agreement”) pursuant to which, amongst other things, the Company has agreed to repurchase a certain number of shares of Class A common stock from an investor of Momentus, at a purchase price of $10.00 per share, immediately following the Closing (the “Repurchase”). The contemplated Repurchase was terminated pursuant to the June 29, 2021 amendment to the Merger Agreement. The Company filed a Form 8-K on May 13, 2021 notifying shareholders of the approval to extend the date to consummate a business combination from May 13, 2021 to August 13, 2021. Shareholders redeemed 19,662 shares of common stock purchased in the Company’s initial public offering as part of the extension. Going Concern In connection with the Company’s assessment of going concern considerations in accordance with Financial Accounting Standard Board’s Accounting Standards Update (“ASU”) 2014-15, “Disclosures of Uncertainties about an Entity’s Ability to Continue as a Going Concern,” the Company has until August 13, 2021 or the extension date, as applicable, to consummate a Business Combination. It is uncertain that the Company will be able to consummate a Business Combination by this time. If a Business Combination is not consummated by this date or the extension date, there will be a mandatory liquidation and subsequent dissolution of the Company. Management has determined that the mandatory liquidation, should a Business Combination not occur, and potential subsequent dissolution raises substantial doubt about the Company’s ability to continue as a going concern. No adjustments have been made to the carrying amounts of assets or liabilities should the Company be required to liquidate after the prescribed date. Management plans to continue its efforts in consummating a business combination by the prescribed date.	NOTE 1. DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS Stable Road Acquisition Corp. (the “Company” or “SRAC”) was incorporated in Delaware on May 28, 2019. The Company was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses (the “Business Combination”). The Company is an early stage and emerging growth company and, as such, the Company is subject to all of the risks associated with early stage and emerging growth companies. The Company has two subsidiaries, Project Marvel First Merger Sub, Inc., a wholly-owned subsidiary of the Company incorporated in Delaware on September 29, 2020 (“First Merger Sub”) and Project Marvel Second Merger Sub, LLC, a wholly-owned subsidiary of the Company incorporated in Delaware on September 29, 2020 (“Second Merger Sub”). First Merger Sub and Second Merger Sub were formed in connection with the proposed business combination with Momentus Inc., a Delaware corporation (“Momentus”), as more fully discussed below. As of December 31, 2020, the Company had not commenced any operations. All activity through December 31, 2020 relates to the Company’s formation, the initial public offering (“Initial Public Offering”), which is described below, identifying a target company for a Business Combination, and the proposed business combination with Momentus, as more fully discussed below. The Company will not generate any operating revenues until after the completion of its initial Business Combination, at the earliest. The Company generates non-operating income in the form of interest income from the proceeds derived from the Initial Public Offering. The registration statement for the Company’s Initial Public Offering was declared effective on November 7, 2019. On November 13, 2019, the Company consummated the Initial Public Offering of 17,250,000 units (the “Units” and, with respect to the shares common stock included in the Units sold, the “Public Shares”), which includes the full exercise by the underwriter of the over-allotment option to purchase an additional 2,250,000 Units, at $10.00 per Unit, generating gross proceeds of $172,500,000, which is described in Note 3. Simultaneously with the closing of the Initial Public Offering, the Company consummated the sale of 545,000 units (the “Placement Units”) at a price of $10.00 per Placement Unit in a private placement to SRC-NI Holdings, LLC, a Delaware limited liability company (the “Sponsor”), and Cantor Fitzgerald & Co. (“Cantor”), the underwriter of the Initial Public Offering, generating gross proceeds of $5,450,000, which is described in Note 4. Transaction costs amounted to $10,924,857, consisting of $3,450,000 of underwriting fees, $6,900,000 of deferred underwriting fees and $574,857 of other offering costs. Following the closing of the Initial Public Offering on November 13, 2019, an amount of $172,500,000 ($10.00 per Unit) from the net proceeds of the sale of the Units in the Initial Public Offering and the sale of the Placement Units was placed in a trust account (“Trust Account”) and invested only in U.S. government securities, within the meaning set forth in Section 2(a)(16) of the Investment Company Act, with a maturity of 180 days or less or in any open-ended investment company that holds itself out as a money market fund selected by the Company meeting the conditions of Rule 2a-7 of the Investment Company Act of 1940, as amended (the “Investment Company Act”), as determined by the Company, until the earlier of: (i) the completion of a Business Combination and (ii) the distribution of the Trust Account, as described below. The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Initial Public Offering and the sale of the Placement Units, although substantially all of the net proceeds are intended to be applied generally toward consummating a Business Combination. There is no assurance that the Company will be able to complete a Business Combination successfully. The Company must complete one or more initial Business Combinations having an aggregate fair market value of at least 80% of the assets held in the Trust Account (excluding the deferred underwriting commissions and taxes payable on interest earned on the Trust Account) at the time of the agreement to enter into the initial Business Combination. The Company will only complete a Business Combination if the post-transaction company owns or acquires 50% or more of the outstanding voting securities of the target or otherwise acquires a controlling interest in the target sufficient for it not to be required to register as an investment company under the Investment Company Act. The Company will provide holders of the outstanding Public Shares (the “Public Stockholders”) with the opportunity to redeem all or a portion of their Public Shares upon the completion of a Business Combination either (i) in connection with a stockholder meeting called to approve the Business Combination or (ii) by means of a tender offer. The decision as to whether the Company will seek stockholder approval of a Business Combination or conduct a tender offer will be made by the Company, solely in its discretion. The Public Stockholders will be entitled to redeem their Public Shares for a pro rata portion of the amount then in the Trust Account ($10.00 per Public Share, plus any pro rata interest earned on the funds held in the Trust Account and not previously released to the Company to pay its tax obligations, less up to $100,000 of interest to pay dissolution expenses). The per-share amount to be distributed to Public Stockholders who redeem their Public Shares will not be reduced by the deferred underwriting commissions the Company will pay to the underwriter (as discussed in Note 6). There will be no redemption rights upon the completion of a Business Combination with respect to the Company’s warrants. The Company will proceed with a Business Combination if the Company has net tangible assets of at least $5,000,001 either immediately prior to or upon such consummation of a Business Combination and, if the Company seeks stockholder approval, a majority of the shares voted are voted in favor of the Business Combination. If a stockholder vote is not required by law and the Company does not decide to hold a stockholder vote for business or other legal reasons, the Company will, pursuant to its Amended and Restated Certificate of Incorporation (the “Amended and Restated Certificate of Incorporation”), conduct the redemptions pursuant to the tender offer rules of the U.S. Securities and Exchange Commission (“SEC”) and file tender offer documents with the SEC prior to completing a Business Combination. If, however, stockholder approval of the transaction is required by law, or the Company decides to obtain stockholder approval for business or legal reasons, the Company will offer to redeem shares in conjunction with a proxy solicitation pursuant to the proxy rules and not pursuant to the tender offer rules. If the Company seeks stockholder approval in connection with a Business Combination, the Company’s Sponsor has agreed to vote its Founder Shares (as defined in Note 5), Placement Shares (as defined in Note 4) and any Public Shares purchased during or after the Initial Public Offering in favor of approving a Business Combination. Additionally, each Public Stockholder may elect to redeem their Public Shares irrespective of whether they vote for or against the proposed transaction. If the Company seeks stockholder approval of a Business Combination and it does not conduct redemptions pursuant to the tender offer rules, the Amended and Restated Certificate of Incorporation provides that a Public Stockholder, together with any affiliate of such stockholder or any other person with whom such stockholder is acting in concert or as a “group” (as defined under Section 13 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), will be restricted from redeeming its shares with respect to more than an aggregate of 15% or more of the Public Shares, without the prior consent of the Company. The Sponsor has agreed (a) to waive its redemption rights with respect to its Founder Shares, Placement Shares and Public Shares held by it in connection with the completion of a Business Combination and (b) not to propose an amendment to the Amended and Restated Certificate of Incorporation (i) that would affect the substance or timing of the Company’s obligation to redeem 100% of its Public Shares if the Company does not complete a Business Combination or (ii) with respect to any other provision relating to stockholders’ rights or pre-business combination activity, unless the Company provides the Public Stockholders with the opportunity to redeem their Public Shares in conjunction with any such amendment. The Company will have until August 13, 2021 or the extension date, as applicable, to complete a Business Combination (the “Combination Period”), including the proposed business combination with Momentus. However, if the Company is unable to complete a Business Combination within the Combination Period, it will (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account including interest earned on the funds held in the Trust Account and not previously released to the Company to pay its tax obligations (less up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding Public Shares, which redemption will completely extinguish Public Stockholders’ rights as stockholders (including the right to receive further liquidating distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining stockholders and the Company’s board of directors, dissolve and liquidate, subject in each case to the Company’s obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law. There will be no redemption rights or liquidating distributions with respect to the Company’s warrants, which will expire worthless if the Company fails to complete a Business Combination within the Combination Period. The Sponsor has agreed to waive its liquidation rights with respect to the Founder Shares and (along with Cantor) Placement Shares if the Company fails to complete a Business Combination within the Combination Period. However, if the Sponsor acquires Public Shares after the Initial Public Offering, such Public Shares will be entitled to liquidating distributions from the Trust Account if the Company fails to complete a Business Combination within the Combination Period. The underwriter has agreed to waive its rights to its deferred underwriting commission (see Note 6) held in the Trust Account in the event the Company does not complete a Business Combination within the Combination Period and, in such event, such amounts will be included with the other funds held in the Trust Account that will be available to fund the redemption of the Public Shares. In the event of such distribution, it is possible that the per share value of the assets remaining available for distribution will be less than the Initial Public Offering price per Unit ($10.00). In order to protect the amounts held in the Trust Account, the Sponsor has agreed to be liable to the Company if and to the extent any claims by a third party for services rendered or products sold to the Company, or a prospective target business with which the Company has entered into a written letter of intent, confidentiality or similar agreement or business combination agreement, reduce the amount of funds in the Trust Account to below the lesser of (i) $10.00 per Public Share and (ii) the actual amount per Public Share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per share due to reductions in the value of the trust assets less taxes payable. This liability will not apply with respect to any claims by a third party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) or to any claims under the Company’s indemnity of the underwriter of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). The Company will seek to reduce the possibility that the Sponsor will have to indemnify the Trust Account due to claims of creditors by endeavoring to have all vendors, service providers, prospective target businesses or other entities with which the Company does business, execute agreements with the Company waiving any right, title, interest or claim of any kind in or to monies held in the Trust Account. The Company’s independent registered public accounting firm and the underwriter of the Initial Public Offering will not execute agreements with the Company waiving such claims to the monies held in the Trust Account. Proposed Business Combination with Momentus Inc. On October 7, 2020, SRAC entered into an Agreement and Plan of Merger, as amended on March 5, 2021, April 6, 2021 and June 29, 2021 (the “Merger Agreement”), by and among SRAC, Project Marvel First Merger Sub, Inc., a Delaware corporation and wholly-owned subsidiary of SRAC (“First Merger Sub”), and Project Marvel Second Merger Sub, LLC, a Delaware limited liability company and wholly-owned subsidiary of SRAC (“Second Merger Sub”), and Momentus Inc., a Delaware corporation (“Momentus”), pursuant to which, among other things: (a) First Merger Sub will merge with and into Momentus (“First Merger”), with Momentus being the surviving corporation of the First Merger and (b) immediately following the First Merger and as part of the same overall transaction as the First Merger, Momentus will merge with and into Second Merger Sub (the “Second Merger” and, together with the First Merger, the “Mergers”), with Second Merger Sub being the surviving company of the Second Merger. The Merger Agreement, the Mergers and the other transactions contemplated by the Merger Agreement are referred to herein as the “Proposed Transaction.” Pursuant to the Merger Agreement, the aggregate merger consideration payable to the equityholders of Momentus will be paid in equity consideration equal to $1,131,000,000, minus Momentus’ indebtedness for borrowed money as of the closing of the Mergers (the “Closing”), plus the amount of Momentus’ cash and cash equivalents (excluding restricted cash as determined in accordance with GAAP, any cash being held on behalf of Momentus’ customers and any security deposits for leases) as of the Closing, plus the aggregate exercise price of all outstanding options and warrants (the “Merger Consideration”). The Merger Consideration payable to the stockholders of Momentus will be paid in shares of newly issued Class A common stock of SRAC, with a deemed value of $10 per share. In addition, SRAC will pay off, or cause to be paid off, on behalf of Momentus and in connection with the Closing, Momentus’ outstanding indebtedness for borrowed money. In connection with the Proposed Transaction, each share of Momentus’ capital stock (subject to limited exceptions) will be cancelled and automatically deemed for all purposes to represent the right to receive a portion of the Merger Consideration in accordance with Momentus’ organizational documents. In addition, the Merger Consideration that is paid with respect to any shares of Momentus’ capital stock that is subject to any vesting restrictions or other conditions shall continue to be subject to such vesting restrictions and conditions after the Closing. Each option of Momentus that is outstanding and unexercised immediately prior to the Closing (whether vested or unvested) will be automatically assumed by SRAC and converted into an option to acquire an adjusted number of shares of Class A common stock at an adjusted exercise price per share and will continue to be governed by substantially the same terms and conditions (including vesting and exercisability terms) as were applicable to the corresponding former option. Each warrant to purchase shares of capital stock of Momentus that is outstanding and unexercised immediately prior to the Closing will be automatically converted into a warrant to acquire an adjusted number of shares of Class A common stock at an adjusted exercise price per share and will continue to be governed by substantially the same terms and conditions (including applicable vesting conditions) as were applicable to the corresponding former warrant. Consummation of the Proposed Transaction is subject to customary closing conditions for special purpose acquisition companies, including the following conditions to each party’s obligations, among others: (a) approval by SRAC’s stockholders and Momentus’ stockholders, (b) SRAC having at least $5,000,001 of net tangible assets as of the effective time of the consummation of the Mergers, and (c) the approval of the listing of the shares of Class A common stock to be issued in connection with the Closing on The Nasdaq Stock Market LLC and the effectiveness of a Registration Statement on Form S-4. The Merger Agreement may be terminated under certain customary and limited circumstances prior to the consummation of the Mergers. On October 7, 2020 and July 15, 2021, the Company entered into Subscription Agreements with certain investors pursuant to which the investors have agreed to purchase an aggregate of 11,000,000 shares of Class A common stock in a private placement for $10.00 per share (the “Private Placement”). The proceeds from the Private Placement will be partially used to fund the Repurchase and for general working capital purposes following the closing. The closing of the transactions contemplated by the Subscription Agreements is contingent upon, among other customary closing conditions, the substantially concurrent consummation of the Proposed Transaction. Concurrently with the execution of the Merger Agreement, an investor in Momentus, the Company and Momentus entered into a repurchase agreement (the “Repurchase Agreement”) pursuant to which, among other things, the Company has agreed to repurchase a certain number of shares of Class A common stock from an investor in Momentus, at a purchase price of $10.00 per share, immediately following the Closing (the “Repurchase”). The Repurchase is contingent on the amount of available cash the Company has at the Closing from (a) the Private Placement (and any alternative financing arranged by the Company and Momentus in the event the Private Placement becomes unavailable) and (b) the funds in the Company’s trust account (after taking into account payments required to satisfy SRAC’s stockholder redemptions), after further deducting the amount of the Company’s transaction expenses and Momentus’ transaction expenses (“Net Proceeds”) being in excess of $265 million. If Net Proceeds exceed $265,000,000 but are less than $280,000,000, the number of shares of Class A common stock subject to the Repurchase will be equal to the amount by which Net Proceeds exceed $250 million, divided by $10.00. In the event Net Proceeds are in excess of $280,000,000, the number of shares of Class A common stock subject to the Repurchase will be equal to $30,000,000, divided by $10.00. At the closing of the Repurchase, the Company will be entitled to deduct from such cash payment an amount equal to 3.3% of such cash payment (representing PML’s obligation to pay Momentus a portion of its transaction expenses). Going Concern In connection with the Company’s assessment of going concern considerations in accordance with Financial Accounting Standard Board’s Accounting Standards Update (“ASU”) 2014-15, “Disclosures of Uncertainties about an Entity’s Ability to Continue as a Going Concern,” the Company has until August 13, 2021 or the extension date, as applicable, to consummate a Business Combination. It is uncertain that the Company will be able to consummate a Business Combination by this time. If a Business Combination is not consummated by this date or the extension date, there will be a mandatory liquidation and subsequent dissolution of the Company. Management has determined that the mandatory liquidation, should a Business Combination not occur, and potential subsequent dissolution raises substantial doubt about the Company’s ability to continue as a going concern. No adjustments have been made to the carrying amounts of assets or liabilities should the Company be required to liquidate after the prescribed date. Management plans to continue its efforts in consummating a business combination by the prescribed date.

Initial Public Offering	6 Months Ended	12 Months Ended
Initial Public Offering	Jun. 30, 2021	Dec. 31, 2020
Stable Road Acquisition Corp [Member]
Initial Public Offering [Line Items]
INITIAL PUBLIC OFFERING	NOTE 3. INITIAL PUBLIC OFFERING Pursuant to the Initial Public Offering, the Company sold 17,250,000 Units, which includes the full exercise by the underwriter of its option to purchase an additional 2,250,000 Units at $10.00 per Unit. Each Unit consists of one share of Class A common stock and one-half of one redeemable warrant (“Public Warrant”). Each whole Public Warrant entitles the holder to purchase one share of Class A common stock at a price of $11.50 per share, subject to adjustment (see Note 7).	NOTE 3. INITIAL PUBLIC OFFERING Pursuant to the Initial Public Offering, the Company sold 17,250,000 Units, which includes the full exercise by the underwriter of its option to purchase an additional 2,250,000 Units at $10.00 per Unit. Each Unit consists of one share of Class A common stock and one-half of one redeemable warrant (“Public Warrant”). Each whole Public Warrant entitles the holder to purchase one share of Class A common stock at a price of $11.50 per share, subject to adjustment (see Note 7).

Private Placement	6 Months Ended	12 Months Ended
Private Placement	Jun. 30, 2021	Dec. 31, 2020
Stable Road Acquisition Corp [Member]
Private Placement [Line Items]
PRIVATE PLACEMENT	NOTE 4. PRIVATE PLACEMENT Simultaneously with the closing of the Initial Public Offering, the Sponsor and Cantor purchased an aggregate of 545,000 Placement Units at a price of $10.00 per Placement Unit, for an aggregate purchase price of $5,450,000. Each Placement Unit consists of one share of Class A common stock (“Placement Share”) and one-half of one redeemable warrant (“Placement Warrant”). Each whole Placement Warrant is exercisable to purchase one share of Class A common stock at a price of $11.50 per share. The proceeds from the Placement Units were added to the proceeds from the Initial Public Offering held in the Trust Account. If the Company does not complete a Business Combination within the Combination Period, the proceeds from the sale of the Placement Units will be used to fund the redemption of the Public Shares (subject to the requirements of applicable law), and the Placement Units and all underlying securities will be worthless.	NOTE 4. PRIVATE PLACEMENT Simultaneously with the closing of the Initial Public Offering, the Sponsor and Cantor purchased an aggregate of 545,000 Placement Units at a price of $10.00 per Placement Unit, for an aggregate purchase price of $5,450,000. Each Placement Unit consists of one share of Class A common stock (“Placement Share”) and one-half of one redeemable warrant (“Placement Warrant”). Each whole Placement Warrant is exercisable to purchase one share of Class A common stock at a price of $11.50 per share. The proceeds from the Placement Units were added to the proceeds from the Initial Public Offering held in the Trust Account. If the Company does not complete a Business Combination within the Combination Period, the proceeds from the sale of the Placement Units will be used to fund the redemption of the Public Shares (subject to the requirements of applicable law), and the Placement Units and all underlying securities will be worthless.

Warrant Liabilities	6 Months Ended	12 Months Ended
Warrant Liabilities	Jun. 30, 2021	Dec. 31, 2020
Stable Road Acquisition Corp [Member]
Warrant Liabilities [Line Items]
WARRANT LIABILITIES	NOTE 8. WARRANT LIABILITIES At June 30, 2021 and December 31, 2020, there were 8,625,000 Public Warrants and 272,500 Private Placement Warrants outstanding to purchase an aggregate of 12,066,667 shares of Class A common stock which are contingent upon the occurrence of future events as discussed below. Public Warrants may only be exercised for a whole number of shares. No fractional warrants will be issued upon separation of the Units and only whole warrants will trade. The Public Warrants will become exercisable on the later of (a) 30 days after the completion of a Business Combination or (b) 12 months from the closing of the Initial Public Offering. The Public Warrants will expire five years after the completion of a Business Combination or earlier upon redemption or liquidation. The Company will not be obligated to deliver any shares of Class A common stock pursuant to the exercise of a warrant and will have no obligation to settle such warrant exercise unless a registration statement under the Securities Act with respect to the shares of Class A common stock underlying the warrants is then effective and a prospectus relating thereto is current, subject to the Company satisfying its obligations with respect to registration. No warrant will be exercisable and the Company will not be obligated to issue shares of Class A common stock upon exercise of a warrant unless Class A common stock issuable upon such warrant exercise has been registered, qualified or deemed to be exempt under the securities laws of the state of residence of the registered holder of the warrants. The Company has agreed that as soon as practicable, but in no event later than 15 business days after the closing of a Business Combination, the Company will use its best efforts to file with the SEC a registration statement covering the shares of Class A common stock issuable upon exercise of the warrants, to cause such registration statement to become effective and to maintain a current prospectus relating to those shares of Class A common stock until the warrants expire or are redeemed, as specified in the warrant agreement. If a registration statement covering the shares of Class A common stock issuable upon exercise of the warrants is not effective by the 60th business day after the closing of a Business Combination, warrant holders may, until such time as there is an effective registration statement and during any period when the Company will have failed to maintain an effective registration statement, exercise warrants on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act or another exemption. Notwithstanding the foregoing, if a registration statement covering the Class A common stock issuable upon exercise of the warrants is not effective within a specified period following the consummation of a Business Combination, warrant holders may, until such time as there is an effective registration statement and during any period when the Company shall have failed to maintain an effective registration statement, exercise warrants on a cashless basis pursuant to the exemption provided by Section 3(a)(9) of the Securities Act, provided that such exemption is available. If that exemption, or another exemption, is not available, holders will not be able to exercise their warrants on a cashless basis. Once the warrants become exercisable, the Company may redeem the Public Warrants: • in whole and not in part; • at a price of $0.01 per warrant; • upon not less than 30 days’ prior written notice of redemption; and • if, and only if, the reported last sale price of the Company’s Class A common stock equals or exceeds $18.00 per share for any 20 trading days within a 30-trading day period ending three business days before the Company sends the notice of redemption to the warrant holders. If and when the warrants become redeemable by the Company, the Company may not exercise its redemption right if the issuance of shares of common stock upon exercise of the warrants is not exempt from registration or qualification under applicable state blue sky laws or the Company is unable to effect such registration or qualification. If the Company calls the Public Warrants for redemption, management will have the option to require all holders that wish to exercise the Public Warrants to do so on a “cashless basis,” as described in the warrant agreement. The exercise price and number of shares of Class A common stock issuable upon exercise of the warrants may be adjusted in certain circumstances including in the event of a stock dividend, or recapitalization, reorganization, merger or consolidation. However, the warrants will not be adjusted for issuance of Class A common stock at a price below its exercise price. Additionally, in no event will the Company be required to net cash settle the warrants. If the Company is unable to complete a Business Combination within the Combination Period and the Company liquidates the funds held in the Trust Account, holders of warrants will not receive any of such funds with respect to their warrants, nor will they receive any distribution from the Company’s assets held outside of the Trust Account with the respect to such warrants. Accordingly, the warrants may expire worthless. In addition, if (x) the Company issues additional shares of Class A common stock or equity-linked securities for capital raising purposes in connection with the closing of a Business Combination at an issue price or effective issue price of less than $9.20 per share of Class A common stock (with such issue price or effective issue price to be determined in good faith by the Company’s board of directors and, in the case of any such issuance to the Sponsor or its affiliates, without taking into account any Founder Shares held by the Sponsor or such affiliates, as applicable, prior to such issuance) (the “Newly Issued Price”), and (y) the aggregate gross proceeds from such issuances represent more than 60% of the total equity proceeds, and interest thereon, available for the funding of a Business Combination on the date of the consummation of a Business Combination (net of redemptions), and (z) the volume weighted average trading price of the shares of Class A common stock during the 20 trading day period starting on the trading day prior to the day on which the Company consummates a Business Combination (such price, the “Market Value”) is below $9.20 per share, the exercise price of the warrants will be adjusted (to the nearest cent) to be equal to 115% of the higher of the Market Value and the Newly Issued Price, and the $18.00 per share redemption trigger price will be adjusted (to the nearest cent) to be equal to 180% of the higher of the Market Value and the Newly Issued Price. The Placement Warrants are identical to the Public Warrants underlying the Units sold in the Initial Public Offering, except that the Placement Warrants and the Class A common stock issuable upon the exercise of the Placement Warrants will not be transferable, assignable or salable until 30 days after the completion of a Business Combination, subject to certain limited exceptions. Additionally, the Placement Warrants will be exercisable on a cashless basis and be non-redeemable so long as they are held by the initial purchasers or their permitted transferees. If the Placement Warrants are held by someone other than the initial purchasers or their permitted transferees, the Placement Warrants will be redeemable by the Company and exercisable by such holders on the same basis as the Public Warrants.	NOTE 8. WARRANTS Warrants — Public Warrants may only be exercised for a whole number of shares. No fractional warrants will be issued upon separation of the Units and only whole warrants will trade. The Public Warrants will become exercisable on the later of (a) 30 days after the completion of a Business Combination or (b) 12 months from the closing of the Initial Public Offering. The Public Warrants will expire five years after the completion of a Business Combination or earlier upon redemption or liquidation. The Company will not be obligated to deliver any shares of Class A common stock pursuant to the exercise of a warrant and will have no obligation to settle such warrant exercise unless a registration statement under the Securities Act with respect to the shares of Class A common stock underlying the warrants is then effective and a prospectus relating thereto is current, subject to the Company satisfying its obligations with respect to registration. No warrant will be exercisable and the Company will not be obligated to issue shares of Class A common stock upon exercise of a warrant unless Class A common stock issuable upon such warrant exercise has been registered, qualified or deemed to be exempt under the securities laws of the state of residence of the registered holder of the warrants. The Company has agreed that as soon as practicable, but in no event later than 15 business days after the closing of a Business Combination, the Company will use its best efforts to file with the SEC a registration statement covering the shares of Class A common stock issuable upon exercise of the warrants, to cause such registration statement to become effective and to maintain a current prospectus relating to those shares of Class A common stock until the warrants expire or are redeemed, as specified in the warrant agreement. If a registration statement covering the shares of Class A common stock issuable upon exercise of the warrants is not effective by the 60th business day after the closing of a Business Combination, warrant holders may, until such time as there is an effective registration statement and during any period when the Company will have failed to maintain an effective registration statement, exercise warrants on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act or another exemption. Notwithstanding the foregoing, if a registration statement covering the Class A common stock issuable upon exercise of the warrants is not effective within a specified period following the consummation of a Business Combination, warrant holders may, until such time as there is an effective registration statement and during any period when the Company shall have failed to maintain an effective registration statement, exercise warrants on a cashless basis pursuant to the exemption provided by Section 3(a)(9) of the Securities Act, provided that such exemption is available. If that exemption, or another exemption, is not available, holders will not be able to exercise their warrants on a cashless basis. Once the warrants become exercisable, the Company may redeem the Public Warrants: • in whole and not in part; • at a price of $0.01 per warrant; • upon not less than 30 days’ prior written notice of redemption; and • if, and only if, the reported last sale price of the Company’s Class A common stock equals or exceeds $18.00 per share for any 20 trading days within a 30-trading day period ending three business days before the Company sends the notice of redemption to the warrant holders. If and when the warrants become redeemable by the Company, the Company may not exercise its redemption right if the issuance of shares of common stock upon exercise of the warrants is not exempt from registration or qualification under applicable state blue sky laws or the Company is unable to effect such registration or qualification. If the Company calls the Public Warrants for redemption, management will have the option to require all holders that wish to exercise the Public Warrants to do so on a “cashless basis,” as described in the warrant agreement. The exercise price and number of shares of Class A common stock issuable upon exercise of the warrants may be adjusted in certain circumstances including in the event of a stock dividend, or recapitalization, reorganization, merger or consolidation. However, the warrants will not be adjusted for issuance of Class A common stock at a price below its exercise price. Additionally, in no event will the Company be required to net cash settle the warrants. If the Company is unable to complete a Business Combination within the Combination Period and the Company liquidates the funds held in the Trust Account, holders of warrants will not receive any of such funds with respect to their warrants, nor will they receive any distribution from the Company’s assets held outside of the Trust Account with the respect to such warrants. Accordingly, the warrants may expire worthless. In addition, if (x) the Company issues additional shares of Class A common stock or equity-linked securities for capital raising purposes in connection with the closing of a Business Combination at an issue price or effective issue price of less than $9.20 per share of Class A common stock (with such issue price or effective issue price to be determined in good faith by the Company’s board of directors and, in the case of any such issuance to the Sponsor or its affiliates, without taking into account any Founder Shares held by the Sponsor or such affiliates, as applicable, prior to such issuance) (the “Newly Issued Price”), and (y) the aggregate gross proceeds from such issuances represent more than 60% of the total equity proceeds, and interest thereon, available for the funding of a Business Combination on the date of the consummation of a Business Combination (net of redemptions), and (z) the volume weighted average trading price of the shares of Class A common stock during the 20 trading day period starting on the trading day prior to the day on which the Company consummates a Business Combination (such price, the “Market Value”) is below $9.20 per share, the exercise price of the warrants will be adjusted (to the nearest cent) to be equal to 115% of the higher of the Market Value and the Newly Issued Price, and the $18.00 per share redemption trigger price will be adjusted (to the nearest cent) to be equal to 180% of the higher of the Market Value and the Newly Issued Price. The Placement Warrants are identical to the Public Warrants underlying the Units sold in the Initial Public Offering, except that the Placement Warrants and the Class A common stock issuable upon the exercise of the Placement Warrants will not be transferable, assignable or salable until 30 days after the completion of a Business Combination, subject to certain limited exceptions. Additionally, the Placement Warrants will be exercisable on a cashless basis and be non-redeemable so long as they are held by the initial purchasers or their permitted transferees. If the Placement Warrants are held by someone other than the initial purchasers or their permitted transferees, the Placement Warrants will be redeemable by the Company and exercisable by such holders on the same basis as the Public Warrants.

Fair Value Measurements

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Fair Value Measurements [Line Items]

FAIR VALUE MEASUREMENTS

NOTE 9. FAIR VALUE MEASUREMENTS

The fair value of the Company’s financial assets and liabilities reflects management’s estimate of amounts that the Company would have received in connection with the sale of the assets or paid in connection with the transfer of the liabilities in an orderly transaction between market participants at the measurement date. In connection with measuring the fair value of its assets and liabilities, the Company seeks to maximize the use of observable inputs (market data

obtained from independent sources) and to minimize the use of unobservable inputs (internal assumptions about how market participants would price assets and liabilities). The following fair value hierarchy is used to classify assets and liabilities based on the observable inputs and unobservable inputs used in order to value the assets and liabilities:

		Level 1:		Quoted prices in active markets for identical assets or liabilities. An active market for an asset or liability is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis.

		Level 2:		Observable inputs other than Level 1 inputs. Examples of Level 2 inputs include quoted prices in active markets for similar assets or liabilities and quoted prices for identical assets or liabilities in markets that are not active.

		Level 3:		Unobservable inputs based on our assessment of the assumptions that market participants would use in pricing the asset or liability.

The Company classifies its U.S. Treasury and equivalent securities as held-to-maturity in accordance with ASC Topic 320 “Investments — Debt and Equity Securities.” Held-to-maturity securities are those securities which the Company has the ability and intent to hold until maturity. Held-to-maturity treasury securities are recorded at amortized cost on the accompanying consolidated balance sheets and adjusted for the amortization or accretion of premiums or discounts.

At June 30, 2021, assets held in the Trust Account were comprised of $1,258 in cash and $172,748,233 in a Treasury Preferred Fund that invests in U.S. Treasury securities. During the three and six months ended June 30, 2021, the Company withdrew $184,489 of interest income from the Trust Account to pay for franchise taxes.

At December 31, 2020, assets held in the Trust Account were comprised of $636 in cash and $173,107,113 in U.S. Treasury securities. During the three and six months ended June 30, 2020, the Company withdrew $824,873 of interest income from the Trust Account to pay for franchise taxes.

The gross holding gains and fair value of held-to-maturity securities at December 31, 2020 are as follows:

		Held-To-Maturity		Amortized Cost			Gross Holding Gains			Fair Value
December 31, 2020		U.S.Treasury Securities		$	173,107,113		$	1,887		$	173,109,000

The following tables present information about the Company’s liabilities that are measured at fair value on a recurring basis at June 30, 2021 and December 31, 2020 and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine such fair value:

	Quoted Prices in Active Markets
Description	Level	June 30, 2021
Assets:
Marketable securities held in Trust Account – U.S. Treasury Securities Money Market Fund	1	$	172,748,233

	Level	June 30, 2021	December 31, 2020
Liabilities:
Warrant Liability – Public Warrants	1	36,225,000	45,625,388
Warrant Liability – Private Placement Warrants	3	1,228,975	2,452,500

The Company established the initial fair value for the Warrants on November 13, 2019, the date of the Company’s Initial Public Offering, using a Black-Scholes Model for private warrants and a Post-Acquisition Simulation for public warrants. The Company allocated the proceeds received from (i) the sale of Units (which is inclusive of one share of common stock and one-third of one Public Warrant), (ii) the sale of Private Placement Warrants, and (iii) the issuance of common shares, first to the Warrants based on their fair values as determined at initial measurement, with the remaining proceeds allocated to common shares subject to possible redemption, and common shares based on their relative fair values at the initial measurement date.

The key inputs into the Black-Scholes model for the Private Placement Warrants were as follows at June 30, 2021:

Input	June 30, 2021			December 31, 2020
Risk-free interest rate		0.89	%		1.73	%
Holding period (years)		5.12			5.25
Volatility		25.00	%		25.00	%
Exercise price	$	11.50		$	11.50
Underlying value	$	13.97		$	9.50

On June 30, 2021, the Private Placement Warrants and Public Warrants were determined to be $4.51 and $4.20, respectively per warrant for aggregate values of $1.2 million and $36.2 million, respectively.

The table below presents the change in fair value of Private Placement Warrants measured using Level 3 inputs for the six months ended June 30, 2021:

	Private Placement
Fair value as of December 31, 2020	$	2,452,500
Change in valuation inputs or other assumptions		(1,223,525	)
Fair value as of June 30, 2021	$	1,228,975

Level 3 financial liabilities consist of the Private Placement Warrant liability for which there is no current market such that the determination of fair value requires significant judgment or estimation. Changes in fair value measurements categorized within Level 3 of the fair value hierarchy are analyzed each period based on changes in estimates or assumptions and recorded as appropriate.

NOTE 10. FAIR VALUE MEASUREMENTS

Level 1:		Quoted prices in active markets for identical assets or liabilities. An active market for an asset or liability is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis.
Level 2:		Observable inputs other than Level 1 inputs. Examples of Level 2 inputs include quoted prices in active markets for similar assets or liabilities and quoted prices for identical assets or liabilities in markets that are not active.
Level 3:		Unobservable inputs based on our assessment of the assumptions that market participants would use in pricing the asset or liability.

At December 31, 2020, assets held in the Trust Account were comprised of $636 in cash and $173,107,113 in U.S. Treasury securities. During the year ended December 31, 2020, the Company withdrew $872,653 of interest income from the Trust Account to pay for franchise and income taxes.

At December 31, 2019, assets held in the Trust Account were comprised of $873 in cash and $172,845,138 in U.S. Treasury securities. During the period from May 28, 2019 (inception) through December 31, 2019, the Company did not withdraw any interest income from the Trust Account.

The following tables present information about the Company’s assets and liabilities that are measured at fair value on a recurring basis at December 31, 2020 and 2019 and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine such fair value. The gross holding gains and fair value of held-to-maturity securities at December 31, 2020 and 2019 are as follows:

	Held-To-Maturity	Level	Amortized Cost		Gross Holding Gain		Fair Value
December 31, 2020	U.S. Treasury Securities (Mature on 1/5/2021)	1	$	173,107,113	$	1,887	$	173,109,000

December 31, 2019	U.S. Treasury Securities (Matured on 5/14/2020)	1	$	172,845,138	$	13,410	$	172,858,548

Liabilities:	Level	December 31, 2020	December 31, 2019
Warrant Liability – Public Warrants	1	45,625,388	7,331,250
Warrant Liability – Private Placement Warrants	3	2,452,500	525,925

The Warrants were accounted for as liabilities in accordance with ASC 815-40 and are presented within warrant liabilities on the Company’s consolidated balance sheet. The warrant liabilities are measured at fair value at inception and on a recurring basis, with changes in fair value presented within change in fair value of warrant liabilities in the consolidated statement of operations.

Initial Measurement

The key inputs into the Black-Scholes model for the Private Placement Warrants were as follows at initial measurement:

Input	November 13, 2019 (Initial Measurement)
Risk-free interest rate		1.73	%
Holding period (years)		5.25
Volatility		25.00	%
Exercise price	$	11.50
Underlying value	$	9.50

The key inputs into the Post-Acquisition Simulation for the Public Warrants were as follows at initial measurement:

Input	November 13, 2019 (Initial Measurement)
Risk-free interest rate		1.73	%
Holding period (days)		1,260
Volatility		25.00	%
Warrant redemption price	$	18.00

On November 13, 2019, the Private Placement Warrants and Public Warrants were determined to be $1.67 and $1.57 per warrant for aggregate values of $0.5 million and $13.5 million, respectively.

Subsequent Measurement

The Warrants are measured at fair value on a recurring basis. The subsequent measurement of the Public Warrants as of December 31, 2020 and 2019 is classified as Level 1 due to the use of an observable market quote in an active market.

The key inputs into the Black-Scholes model for the Private Placement Warrants were as follows at December 31, 2020 and 2019:

Input	December 31, 2020			December 31, 2019
Risk-free interest rate		0.31	%		1.74	%
Holding period (years)		5.25			5.25
Volatility		25.00	%		25.00	%
Exercise price	$	11.50		$	11.50
Underlying value	$	10.08		$	9.96

As of December 31, 2020, the aggregate values of the Private Placement Warrants and Public Warrants were $2.5 million and $45.6 million, respectively.

As of December 31, 2019, the aggregate values of the Private Placement Warrants and Public Warrants were approximately $526,000 and $7.3 million, respectively.

The table below presents the Public and Private Warrants at Level 3 from initial measurement to December 31, 2020.

	Private Placement		Public			Warrant Liabilities
Fair value – May 28, 2019	$	—	$	—		$	—
Initial measurement on November 13, 2019 (IPO)		455,075		13,541,250			13,996,325
Change in fair value		70,850		(6,210,000	)		(6,139,150	)
Transfers out of Level 3		—		(7,331,250	)		(7,331,250	)
Fair value as of December 31, 2019	$	525,925	$	—		$	525,925
Change in fair value		1,926,575		—			1,926,575
Fair value as of December 31, 2020	$	2,452,500	$	—		$	2,452,500

Due to the use of quoted prices in an active market (Level 1) to measure the fair value of the Public Warrants, the Company had transfers out of Level 3 totaling $7,331,250, which represents the fair value of the warrants as of December 31, 2019. For each reporting period subsequent to December 31, 2019, the fair value of the Public Warrants are valued using an active market and are classified as Level 1 within the fair value hierarchy.

Level 3 financial liabilities consist of the Private Placement Warrant liability for which there is no current market for these securities such that the determination of fair value requires significant judgment or estimation. Changes in categorization within the fair value hierarchy are recognized at the end of each reporting period based on changes in estimates or assumptions and recorded as appropriate.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Restatement of Previously Issued Consolidated Financial Statements

12 Months Ended

Dec. 31, 2020

Restatement of Previously Issued Consolidated Financial Statements [Line Items]

RESTATEMENT OF PREVIOUSLY ISSUED CONSOLIDATED FINANCIAL STATEMENTS

NOTE 2. RESTATEMENT OF PREVIOUSLY ISSUED CONSOLIDATED FINANCIAL STATEMENTS

The Company previously accounted for its outstanding Public Warrants (as defined in Note 4) and Private Placement Warrants issued in connection with its Initial Public Offering as components of equity instead of as derivative liabilities. The warrant agreement governing the warrants includes a provision that provides for potential changes to the settlement amounts dependent upon the characteristics of the holder of the warrant. In addition, the warrant agreement includes a provision that in the event of a tender or exchange offer made to and accepted by holders of more than 50% of the outstanding shares of a single class of common shares, all holders of the warrants would be entitled to receive cash for their warrants (the “tender offer provision”).

In connection with the audit of the Company’s consolidated financial statements for the year ended December 31, 2020, the Company’s management further evaluated the warrants under Accounting Standards Codification (“ASC”) Subtopic 815-40, Contracts in Entity’s Own Equity. ASC Section 815-40-15 addresses equity versus liability treatment and classification of equity-linked financial instruments, including warrants, and states that a warrant may be classified as a component of equity only if, among other things, the warrant is indexed to the issuer’s common stock. Under ASC Section 815-40-15, a warrant is not indexed to the issuer’s common stock if the terms of the warrant require an adjustment to the exercise price upon a specified event and that event is not an input to the fair value of the warrant. Based on management’s evaluation, the Company’s audit committee, in consultation with management and after discussion with the Company’s independent registered public accounting firm, concluded that the Company’s Private Placement Warrants are not indexed to the Company’s common shares in the manner contemplated by ASC Section 815-40-15 because the holder of the instrument is not an input into the pricing of a fixed-for-fixed option on equity shares. In addition, based on management’s evaluation, the Company’s audit committee, in consultation with management and after discussion with the Company’s independent registered public accounting firm, concluded the tender offer provision included in the warrant agreement fails the “classified in stockholders’ equity” criteria as contemplated by ASC Section 815-40-25.

As a result of the above, the Company should have classified the warrants as derivative liabilities in its previously issued consolidated financial statements. Under this accounting treatment, the Company is required to measure the fair value of the warrants at the end of each reporting period and recognize changes in the fair value from the prior period in the Company’s operating results for the current period.

The Company’s accounting for the warrants as components of equity instead of as derivative liabilities did not have any effect on the Company’s previously reported operating expenses or cash.

	As Previously Reported			Adjustments			As Restated
Balance sheet as of November 13, 2019 (audited)
Warrant Liabilities	$	—		$	13,996,325		$	13,996,325
Total Liabilities		6,902,150			13,996,325			20,898,475
Class A Common Stock Subject to Possible Redemption		162,038,390			(13,996,330	)		148,042,060
Class A Common Stock		159			140			299
Additional Paid-in Capital		5,011,163			857,554			5,868,717
(Accumulated Deficit) Retained Earnings		(11,750	)		(857,689	)		(869,439	)
Total Stockholders’ Equity		5,000,003			5			5,000,008
Number of Class A common stock subject to redemption		16,203,839			(1,399,633	)		14,804,206

Balance sheet as of December 31, 2019 (audited)
Warrant Liabilities	$	—		$	7,857,175		$	7,857,175
Total Liabilities		7,095,309			7,857,175			14,952,484
Class A Common Stock Subject to Possible Redemption		162,112,500			(7,857,180	)		154,255,320
Class A Common Stock		158			78			236
Additional Paid-in Capital		4,937,054			(4,937,054	)		0
(Accumulated Deficit) Retained Earnings		62,359			4,936,981			4,999,340
Total Stockholders’ Equity		5,000,002			5			5,000,004

Balance sheet as of March 31, 2020 (unaudited)
Warrant Liabilities	$	—		$	6,907,475		$	6,907,475
Total Liabilities		7,240,139			6,907,475			14,147,614
Class A Common Stock Subject to Possible Redemption		162,371,970			(6,907,480	)		155,464,490
Class A Common Stock		156			69			225
Additional Paid-in Capital		4,677,586			(4,677,586	)		0
(Accumulated Deficit) Retained Earnings		321,830			4,677,522			4,999,352
Total Stockholders’ Equity		5,000,003			5			5,000,008

Balance sheet as of June 30, 2020 (unaudited)
Warrant Liabilities	$	—		$	5,721,775		$	5,721,775
Total Liabilities		7,038,476			5,721,775			12,760,251
Class A Common Stock Subject to Possible Redemption		162,408,340			(5,721,780	)		156,686,560
Class A Common Stock		155			57			212
Additional Paid-in Capital		4,641,217			(4,641,217	)		0
(Accumulated Deficit) Retained Earnings		358,202			4,641,165			4,999,367
Total Stockholders’ Equity		5,000,005			5			5,000,010

Balance sheet as of September 30, 2020 (unaudited)
Warrant Liabilities	$	—		$	10,424,088		$	10,424,088
Total Liabilities		6,989,141			10,424,088			17,413,229
Class A Common Stock Subject to Possible Redemption		162,243,730			(10,424,090	)		151,819,640
Class A Common Stock		157			104			261
Additional Paid-in Capital		4,805,825			61,046			4,866,871
Accumulated Deficit) Retained Earnings		193,592			(61,148	)		132,444
Total Stockholders’ Equity		5,000,005			2			5,000,007

	As Previously Reported			Adjustments			As Restated
Balance sheet as of December 31, 2020 (audited)
Warrant Liabilities	$	—		$	48,077,888		$	48,077,888
Total Liabilities		9,385,896			48,077,888			57,463,784
Class A Common Stock Subject to Possible Redemption		159,347,050			(48,077,890	)		111,269,160
Class A Common Stock		186			480			666
Additional Paid-in Capital		7,702,476			37,714,470			45,416,946
Accumulated Deficit		(2,703,091	)		(37,714,948	)		(40,418,039	)
Total Stockholders’ Equity		5,000,002			2			5,000,004

Statement of operations for period from May 28, 2019 (inception) through December 31, 2019 (audited)
Net income (loss)	$	62,359		$	5,281,461		$	5,343,820
Transaction Costs		—			(857,689	)		(857,689	)
Change in fair value of warrant liabilities		—			6,139,150			6,139,150
Basic net loss per share, Class A and Class B non-redeemable common stock		(0.03	)		1.31			1.28
Diluted net loss per share, Class A and Class B non-redeemable common stock		—			1.24			1.24

Statement of operations for the Three months ended March 31, 2020 (unaudited)
Net income (loss)	$	259,471		$	949,700		$	1,209,171
Change in fair value of warrant liabilities		—			949,700			949,700
Basic and diluted net income (loss) per share, Class A and Class B non-redeemable common stock		(0.04	)		0.20			0.16

Statement of operations for the Three months ended June 30, 2020 (unaudited)
Net income (loss)	$	36,372		$	1,185,700		$	1,222,072
Change in fair value of warrant liabilities		—			1,185,700			1,185,700
Basic and diluted net loss per share, Class A and Class B non-redeemable common stock		(0.05	)		0.24			0.19

Statement of operations for the Six months ended June 30, 2020 (unaudited)
Net income (loss)	$	295,843		$	2,135,400		$	2,431,243
Change in fair value of warrant liabilities		—			2,135,400			2,135,400
Basic and diluted net loss per share, Class A and Class B non-redeemable common stock		(0.09	)		0.44			0.35

Statement of operations for the Three months ended September 30, 2020 (unaudited)
Net income (loss)	$	(164,610	)	$	(4,702,313	)	$	(4,866,923	)
Change in fair value of warrant liabilities		—			(4,702,313	)		(4,702,313	)
Basic and diluted net loss per share, Class A and Class B non-redeemable common stock		(0.04	)		(0.96	)		(1.00	)

	As Previously Reported			Adjustments			As Restated
Statement of operations for the Nine months ended September 30, 2020 (unaudited)
Net income (loss)	$	131,233		$	(2,566,913	)	$	(2,435,680	)
Change in fair value of warrant liabilities		—			(2,566,913	)		(2,566,913	)
Basic and diluted net loss per share, Class A and Class B non-redeemable common stock		(0.13	)		(0.53	)		(0.66	)

Statement of operations for the Year ended December 31, 2020 (audited)
Net income (loss)	$	(2,765,450	)	$	(40,220,713	)	$	(42,986,163	)
Change in fair value of warrant liabilities		—			(40,220,713	)		(40,220,713	)
Basic and diluted net loss per share, Class A and Class B non-redeemable common stock		(0.72	)		(8.28	)		(9.00	)

Statements of Cash Flows for the Period ended December 31, 2019 (audited)
Net income (loss)	$	62,359		$	5,281,461		$	5,343,820
Transaction costs allocable to warrant liabilities		—			857,689			857,689
Change in fair value of warrant liabilities		—			(6,139,150	)		(6,139,150	)

Statements of Cash Flows for the Three months ended March 31, 2020 (unaudited)
Net income (loss)	$	259,471		$	949,700		$	1,209,171
Change in fair value of warrant liabilities		—			(949,700	)		(949,700	)

Statements of Cash Flows for the Six months ended June 30, 2020 (unaudited)
Net income (loss)	$	295,843		$	2,135,400		$	2,431,243
Change in fair value of warrant liabilities		—			(2,135,400	)		(2,135,400	)

Statements of Cash Flows for the Nine months ended September 30, 2020 (unaudited)
Net income (loss)	$	131,233		$	(2,566,913	)	$	(2,435,680	)
Change in fair value of warrant liabilities		—			2,566,913			2,566,913

Statements of Cash Flows for the Year ended December 31, 2020 (audited)
Net income (loss)	$	(2,765,450	)	$	(40,220,713	)	$	(42,986,163	)
Change in fair value of warrant liabilities		—			40,220,713			40,220,713

Events (Unaudited) Subsequent to The Date of The Independent Auditor's Report

12 Months Ended

Dec. 31, 2020

Events Unaudited Subsequent To The Date Of The Independent Auditors Report [Abstract]

EVENTS (UNAUDITED) SUBSEQUENT TO THE DATE OF THE INDEPENDENT AUDITOR'S REPORT

NOTE 12. EVENTS (UNAUDITED) SUBSEQUENT TO THE DATE OF THE INDEPENDENT AUDITOR’S REPORT

SEC Settlement

On July 13, 2021, the SEC announced charges against the Company, Momentus, and Momentus’s founder and former CEO, Mikhail Kokorich, for misleading claims about Momentus’s technology and about the U.S. government’s national security concerns about Mr. Kokorich. The SEC’s settled order finds that Momentus and Mr. Kokorich knowingly or recklessly made misrepresentations of material fact and misleading omissions in violation of antifraud provisions of U.S. federal securities laws, and that the Company negligently made misrepresentations of material fact and misleading omissions in violation of antifraud provisions of U.S. federal securities laws, as well as related reporting and proxy solicitation provisions. The SEC also announced charges against the Sponsor and Brian Kabot, finding that Mr. Kabot negligently violated provisions of U.S. federal securities laws related to proxy solicitations and that Mr. Kabot and the Sponsor caused the Company’s violation of negligence-based antifraud provisions of the federal securities laws.

Without admitting or denying the SEC’s findings, Momentus, the Company, Mr. Kabot, and the Sponsor consented to an order requiring them to cease and desist from future violations. Momentus will pay a civil penalty of $7.0 million, the Company will pay a civil penalty of $1.0 million, and Mr. Kabot will pay a civil penalty of $40,000. Momentus and the Company have also agreed to provide PIPE investors with the right to terminate their Subscription Agreements prior to the stockholder vote to approve the Proposed Transaction; the Sponsor has agreed to relinquish 250,000 founders’ shares it would otherwise have received upon consummation of the Proposed Transaction; and Momentus has agreed to undertakings requiring enhancements to its disclosure controls, including the creation of an independent board committee and retention of an internal compliance consultant for a period of two years.

Stockholder Lawsuit

On July 15, 2021, a purported stockholder of the Company filed a putative class action complaint against the Company, the Sponsor, Brian Kabot, James Norris, Momentus, and Mikhail Kokorich in the United States District Court for the Central District of California, in a case captioned Jensen v. Stable Road Acquisition Corp., et al., No. 2:21-cv-05744. The complaint alleges that the defendants omitted certain material information in their public statements and disclosures regarding the Proposed Transaction, in violation of the securities laws, and seeks damages on behalf of a putative class of stockholders who purchased the Company’s stock between October 7, 2020 and July 13, 2021.

Accounting Policies, by Policy (Policies)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Accounting Policies, by Policy (Policies) [Line Items]

Unaudited Interim Financial Information

Reclassifications

Going Concern

The Company has a history of operating losses and negative cash flows from operations. Management’s plans to continue as a going concern include raising additional financing, specifically through the Business Combination, and generating long term revenues through multi-year service agreements for its products and services. Prior to the consummation of the Business Combination, the Company is also pursuing debt or equity forms of bridge financing, as may be necessary. There can be no assurance that such plans will be successful and, as such, the Company’s management concluded that substantial doubt exists about the Company’s ability to continue as a going concern. Further, the perception that the Company may not be able to continue as a going concern may also make it more difficult to operate its business due to concerns about its ability to meet its contractual obligations.

Use of Estimates

COVID-19 Pandemic

Emerging Growth Company Status

Restricted Cash

Revenue Recognition

Deferred Fulfillment and Prepaid Launch Costs

SAFE Notes

Advertising Expenses

Advertising is expensed as incurred. Advertising expense for the years ended December 31, 2020 and 2019 was $92,861 and $124,250, respectively.

Deferred Offering Costs

Net Income (Loss) per Common Share

Basic and Diluted Income (Loss) Per Share

		Three and Six Months Ended June 30, 2020
Series Seed preferred stock		42,298,151
Series Seed-1 preferred stock		3,563,412
Series Seed-2 preferred stock		4,751,218
Series A preferred stock		61,962,132
Series A-1 preferred stock		32,301,028
FF preferred stock		20,000,000
Options outstanding under stock incentive plan		35,538,222
Options outstanding outside of stock incentive plan		545,454
Common stock warrants		1,250,000
Preferred stock warrants		774,527
SAFE notes outstanding (shares not reserved)		19,489,239
Total		222,473,383

Basic and Diluted Loss Per Share

	Years Ended December 31,
	2020	2019
Series Seed preferred stock	42,298,151	42,298,151
Series Seed-1 preferred stock	3,563,412	3,563,412
Series Seed-2 preferred stock	4,751,218	4,751,218
Series A preferred stock	61,962,132	61,962,132
Series A-1 preferred stock	32,301,028	32,301,028
FF preferred common stock	20,000,000	20,000,000
Options outstanding under stock incentive plan	29,358,286	24,598,969
Options outstanding outside of stock incentive plan	545,454	545,454
Common stock warrants	1,250,000	1,250,000
Preferred stock warrants	774,527	—
Total	196,804,208	191,270,364

Recently Issued Accounting Standards

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the accounting for income taxes, which simplifies the accounting for income taxes by removing certain exceptions to the general principles in income taxes. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company does not expect the adoption of this standard to have a material impact on the Company’s financial statements.

Recently Adopted Accounting Standards

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). This guidance is intended to increase transparency and comparability among organizations by recognizing lease assets and liabilities on the balance sheets and disclosing key information about lease arrangements. The Company adopted the standard as of January 1, 2020, using the modified retrospective approach and has elected to use the optional transition method which allows the Company to apply the guidance of ASC 840, including disclosure requirements, in the comparative periods presented. In addition, the Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification related to agreements entered prior to adoption.

Basis of Presentation

COVID-19 Impact

Cash and Cash Equivalents

Receivables

Receivables represent tax credits received from the California Franchise Tax Board.

Prepaids and Other Current Assets

Prepaid insurance and prepaid software subscriptions are amortized over the terms of their respective agreements.

Property, Machinery and Equipment, net

Fixed Assets		Estimated Useful Life
Computer equipment		Three years
Furniture and fixtures		Five years
Leasehold improvements		Lesser of estimated useful life or remaining lease term
Machinery and equipment		Seven years

Costs of maintenance or repairs that do not extend the lives of the respective assets are charged to expenses as incurred.

Intangible Assets, net

Impairment of Long-lived Assets

Revenue Recognition

The Company enters into contracts for ‘last-mile’ satellite and cargo delivery, payload hosting and in-orbit servicing options with customers that are primarily in the aerospace industry. From inception to December 31, 2020, the Company has not completed a commercial launch of customer cargo. However, as of December 31, 2020 the Company has signed contracts with customers and has collected $2,624,824 in customer deposits, which are recorded as current and non-current contract liabilities in the Company’s balance sheets and will be recognized as revenue (along with any other fees that have been paid) upon the earlier of the satisfaction of the Company’s performance obligation or when the customer cancels the contract. For the year ended December 31, 2020, the Company recognized revenue related to customer cancelled contracts of $365,000, which was previously recorded as contract liabilities and recorded $183,811 as contract loss contingencies. There are no refund or recourse provisions that enable our customers to recover any non-refundable fees that are paid.

The Company accounts for customer contracts in accordance with ASC Topic 606, Revenue from Contracts with Customers (“ASC 606”), which includes the following five-step model:

• Identification of the contract, or contracts, with a customer.

• Identification of the performance obligations in the contract.

• Determination of the transaction price.

• Allocation of the transaction price to the performance obligations in the contract.

• Recognition of revenue when, or as, the Company satisfies a performance obligation.

Contract Liabilities

Warrants

Fair Value Measurements

• Level 1 — Observable inputs that reflect quoted prices (unadjusted) for identical, unrestricted assets or liabilities in active markets.

The estimated fair value of the Company’s financial instruments are as follows:

		December 31, 2020				December 31, 2019
	Level	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial Assets:
SAFE notes	3	$	314,439,663	$	314,439,663	$	2,500,000	$	2,500,000
Warrant liability	3		3,206,185		3,206,185		—		—
Total		$	317,645,848	$	317,645,848	$	2,500,000	$	2,500,000

Cost of Revenue

Leases

The amount that is ultimately sustained for an individual uncertain tax position or for all uncertain tax positions in the aggregate could differ from the amount that is initially recognized.

Segment Reporting

Accounting Policies, by Policy (Policies) [Line Items]

Use of Estimates

Net Income (Loss) per Common Share

Net income (loss) per common share is computed by dividing net income (loss) by the weighted average number of shares of common stock outstanding for the period.

The following table reflects the calculation of basic and diluted net income per common share (in dollars, except per share amounts):

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
Redeemable Class A Common Stock
Numerator: Net Income allocable to Redeemable Class A Common Stock
Interest Income	$	4,311		$	355,824		$	23,357		$	1,025,613
Less: Income and Franchise Tax available to be withdrawn from the Trust Account		(4,311	)		(355,824	)		(23,357	)		(1,025,613	)
Redeemable Net Income	$	—		$	—		$	—		$	—
Denominator: Weighted Average Redeemable Class A Common Stock
Redeemable Class A Common Stock, Basic and Diluted		17,240,709			17,250,000			17,245,329			17,250,000
Net Income/Basic and Diluted Redeemable Class A Common Stock	$	0.00		$	0.02		$	0.00		$	0.04

Non-Redeemable Class A and B Common Stock
Numerator: Net Income minus Net Income – Basic
Net Income	$	(2,884,835	)	$	1,222,072		$	2,881,651		$	2,431,243
Less: Redeemable Net Income – Basic		—			—			—			—
Non-Redeemable Net Loss	$	(2,884,835	)	$	1,222,072		$	2,881,651		$	2,431,243
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Basic		4,857,500			4,857,500			4,857,500			4,857,500
Net income, Basic Non-Redeemable Class A and B Common Stock	$	(0.59	)	$	0.19		$	0.59		$	0.35

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
Non-Redeemable Class A and B Common Stock
Numerator: Net Income minus Net Earnings – Diluted
Non-Redeemable Net Income – Basic	$	(2,884,835	)	$	1,222,072		$	2,881,651		$	2,431,243
Less: Change in Fair Value of Derivative Liability		(1,904,150	)		(1,185,700	)		(10,623,913	)		(2,135,400	)
Non-Redeemable Net Loss – Diluted	$	(4,788,985	)	$	36,372		$	(7,742,262	)	$	295,843
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Diluted		5,005,558			4,857,500			7,105,104			4,857,500
Net loss, Diluted Non-Redeemable Class A and B Common Stock	$	(0.96	)	$	0.19		$	(1.09	)	$	0.35

Net Income (Loss) per Common Share

The following table reflects the calculation of basic and diluted net income (loss) per common share (in dollars, except per share amounts):

	Year Ended December 31, 2020			For the Period from May 28, 2019 (Inception) Through December 31, 2019
Redeemable Class A Common Stock
Numerator: Net Income (loss) allocable to Redeemable Class A Common Stock
Interest Income	$	1,134,391		$	346,011
Income and Franchise Tax		(378,916	)		(167,069	)
Redeemable Net Income	$	755,475		$	178,942
Denominator: Weighted Average Redeemable Class A Common Stock
Redeemable Class A Common Stock, Basic and Diluted		17,250,000			17,250,000
Net Income (loss)/Basic and Diluted Redeemable Class A Common Stock	$	0.04		$	0.01

Non-Redeemable Class A and B Common Stock
Numerator: Net Income (loss) minus Redeemable Net Income (loss)
Net Income (loss)	$	(42,986,163	)	$	5,343,820
Redeemable Net Income (loss)		(755,475	)		(178,942	)
Non-Redeemable Net Income (loss)	$	(43,741,638	)	$	5,164,878
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Basic		4,857,500			4,041,761
Net Income (loss)/Basic Non-Redeemable Class A and B Common Stock	$	(9.00	)	$	1.28
Non-Redeemable Class A and B Common Stock, Diluted		4,857,500			4,168,777
Net Income (loss)/Diluted Non-Redeemable Class A and B Common Stock	$	(9.00	)	$	1.24

Class A Common Stock Subject to Possible Redemption

Basis of Presentation

Principles of Consolidation

Basis of Presentation

Emerging Growth Company

Further, Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging growth companies but any such election to opt out is irrevocable. The Company has elected not to opt out of such extended transition period which means that when a standard is issued or revised and it has different application dates for public or private companies, the Company, as an emerging growth company, can adopt the new or revised standard at the time private companies adopt the new or revised standard. This may make comparison of the Company’s financial statements with another public company which is neither an emerging growth company nor an emerging growth company which has opted out of using the extended transition period difficult or impossible because of the potential differences in accounting standards used.

Offering Costs

Warrant Liabilities

For issued or modified warrants that meet all of the criteria for equity classification, the warrants are required to be recorded as a component of additional paid-in-capital at the time of issuance. For issued or modified warrants that do not meet all the criteria for equity classification, the warrants are required to be recorded at their initial fair value on the date of issuance, and each balance sheet date thereafter. The Company accounts for the warrants issued in connection with its Initial Public Offering in accordance with the guidance contained in ASC 815-40, under which the warrants do not meet the criteria for equity treatment and must be recorded as liabilities. Accordingly, the Company classifies the warrants as liabilities at their fair value and adjusts the warrants to fair value at each reporting period. This liability is subject to re-measurement at each balance sheet date until exercised, and any change in fair value is recognized in the Company’s statement of operations. The fair value of the public warrants initially was estimated using a Post-Acquisition Simulation, with subsequent measurements utilizing the public trading price. The fair value of the private warrants was initially and subsequently measured using the Black-Scholes Model (see Note 9).

Concentration of Credit Risk

Fair Value of Financial Instruments

Recently Accounting Standards

Recent Accounting Pronouncements

Recently Accounting Standards

Summary of Significant Accounting Policies (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Summary of Significant Accounting Policies (Tables) [Line Items]

Schedule of diluted loss per share

		Three and Six Months Ended June 30, 2020
Series Seed preferred stock		42,298,151
Series Seed-1 preferred stock		3,563,412
Series Seed-2 preferred stock		4,751,218
Series A preferred stock		61,962,132
Series A-1 preferred stock		32,301,028
FF preferred stock		20,000,000
Options outstanding under stock incentive plan		35,538,222
Options outstanding outside of stock incentive plan		545,454
Common stock warrants		1,250,000
Preferred stock warrants		774,527
SAFE notes outstanding (shares not reserved)		19,489,239
Total		222,473,383

	Years Ended December 31,
	2020	2019
Series Seed preferred stock	42,298,151	42,298,151
Series Seed-1 preferred stock	3,563,412	3,563,412
Series Seed-2 preferred stock	4,751,218	4,751,218
Series A preferred stock	61,962,132	61,962,132
Series A-1 preferred stock	32,301,028	32,301,028
FF preferred common stock	20,000,000	20,000,000
Options outstanding under stock incentive plan	29,358,286	24,598,969
Options outstanding outside of stock incentive plan	545,454	545,454
Common stock warrants	1,250,000	1,250,000
Preferred stock warrants	774,527	—
Total	196,804,208	191,270,364

Schedule of fair value of the company’s financial instruments

		December 31, 2020				December 31, 2019
	Level	Carrying Value		Fair Value		Carrying Value		Fair Value
Financial Assets:
SAFE notes	3	$	314,439,663	$	314,439,663	$	2,500,000	$	2,500,000
Warrant liability	3		3,206,185		3,206,185		—		—
Total		$	317,645,848	$	317,645,848	$	2,500,000	$	2,500,000

Summary of Significant Accounting Policies (Tables) [Line Items]

Schedule of calculation of basic and diluted net income (loss) per common share

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
Redeemable Class A Common Stock
Numerator: Net Income allocable to Redeemable Class A Common Stock
Interest Income	$	4,311		$	355,824		$	23,357		$	1,025,613
Less: Income and Franchise Tax available to be withdrawn from the Trust Account		(4,311	)		(355,824	)		(23,357	)		(1,025,613	)
Redeemable Net Income	$	—		$	—		$	—		$	—
Denominator: Weighted Average Redeemable Class A Common Stock
Redeemable Class A Common Stock, Basic and Diluted		17,240,709			17,250,000			17,245,329			17,250,000
Net Income/Basic and Diluted Redeemable Class A Common Stock	$	0.00		$	0.02		$	0.00		$	0.04

Non-Redeemable Class A and B Common Stock
Numerator: Net Income minus Net Income – Basic
Net Income	$	(2,884,835	)	$	1,222,072		$	2,881,651		$	2,431,243
Less: Redeemable Net Income – Basic		—			—			—			—
Non-Redeemable Net Loss	$	(2,884,835	)	$	1,222,072		$	2,881,651		$	2,431,243
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Basic		4,857,500			4,857,500			4,857,500			4,857,500
Net income, Basic Non-Redeemable Class A and B Common Stock	$	(0.59	)	$	0.19		$	0.59		$	0.35

	Three Months Ended June 30,						Six Months Ended June 30,
	2021			2020			2021			2020
Non-Redeemable Class A and B Common Stock
Numerator: Net Income minus Net Earnings – Diluted
Non-Redeemable Net Income – Basic	$	(2,884,835	)	$	1,222,072		$	2,881,651		$	2,431,243
Less: Change in Fair Value of Derivative Liability		(1,904,150	)		(1,185,700	)		(10,623,913	)		(2,135,400	)
Non-Redeemable Net Loss – Diluted	$	(4,788,985	)	$	36,372		$	(7,742,262	)	$	295,843
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Diluted		5,005,558			4,857,500			7,105,104			4,857,500
Net loss, Diluted Non-Redeemable Class A and B Common Stock	$	(0.96	)	$	0.19		$	(1.09	)	$	0.35

	Year Ended December 31, 2020			For the Period from May 28, 2019 (Inception) Through December 31, 2019
Redeemable Class A Common Stock
Numerator: Net Income (loss) allocable to Redeemable Class A Common Stock
Interest Income	$	1,134,391		$	346,011
Income and Franchise Tax		(378,916	)		(167,069	)
Redeemable Net Income	$	755,475		$	178,942
Denominator: Weighted Average Redeemable Class A Common Stock
Redeemable Class A Common Stock, Basic and Diluted		17,250,000			17,250,000
Net Income (loss)/Basic and Diluted Redeemable Class A Common Stock	$	0.04		$	0.01

Non-Redeemable Class A and B Common Stock
Numerator: Net Income (loss) minus Redeemable Net Income (loss)
Net Income (loss)	$	(42,986,163	)	$	5,343,820
Redeemable Net Income (loss)		(755,475	)		(178,942	)
Non-Redeemable Net Income (loss)	$	(43,741,638	)	$	5,164,878
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Basic		4,857,500			4,041,761
Net Income (loss)/Basic Non-Redeemable Class A and B Common Stock	$	(9.00	)	$	1.28
Non-Redeemable Class A and B Common Stock, Diluted		4,857,500			4,168,777
Net Income (loss)/Diluted Non-Redeemable Class A and B Common Stock	$	(9.00	)	$	1.24

Prepaids and Other Current Assets (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Disclosure Text Block Supplement [Abstract]

Schedule of prepaids and other current assets

	June 30, 2021		December 31, 2020
Prepaid launch costs, current	$	800,000	$	2,260,000
Prepaid research and development		3,819,756		1,452,557
Prepaid insurance and other assets		1,121,785		795,727
Total	$	5,741,542	$	4,508,284

	December 31, 2020		December 31, 2019
Prepaid launch costs-current	$	2,260,000	$	1,603,500
Prepaid research and development		1,452,557		109,264
Prepaid insurance and other assets		795,727		512,450
Total	$	4,508,284	$	2,225,214

Property, Machinery and Equipment, net (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of property, machinery and equipment, net

	June 30, 2021			December 31, 2020
Computer equipment	$	177,868		$	177,868
Furniture and fixtures		205,976			205,976
Leasehold improvements		897,529			665,146
Machinery and equipment		2,800,170			1,935,974
Construction in-progress		1,913,308			117,655
		5,994,851			3,102,619
Less: accumulated depreciation		(1,207,172	)		(781,519	)
Property, machinery and equipment, net	$	4,787,679		$	2,321,100

	December 31, 2020			December 31, 2019
Computer equipment	$	177,868		$	109,586
Furniture and fixtures		205,976			131,891
Leasehold improvements		665,146			461,280
Machinery and equipment		1,935,974			1,079,184
Construction in-progress		117,655			229,983
		3,102,619			2,011,924
Less: accumulated depreciation		(781,519	)		(224,842	)
Property, machinery and equipment, net	$	2,321,100		$	1,787,082

Intangible Assets, net (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible assets, net

		Gross Value			Accumulated Amortization				Net Value			Weighted average remaining amortization period (in years)
Patents/Intellectual Property		$	395,499		$	(73,904	)		$	321,595		7.49

		Gross Value			Accumulated Amortization				Net Value			Weighted average remaining amortization period (in years)
Patents/Intellectual Property		$	356,890		$	(51,408	)		$	305,482		7.62

		Gross Value			Accumulated Amortization			Net Value			Weighted average remaining amortization period (in years)
Patents/Intellectual Property		$	356,890		(51,408	)		$	305,482		7.62

		Gross Value			Accumulated Amortization			Net Value			Weighted average remaining amortization period (in years)
Patents/Intellectual Property		$	235,925		(18,014	)		$	217,911		8.97

Schedule of estimated amortization expense related to intangible assets

Year ending December 31,	Amount
2021 (remainder)	$	23,602
2022		47,204
2023		47,204
2024		41,444
2025		38,487
Thereafter		123,654
Total	$	321,595

Year ending December 31,
2021	$	40,062
2022		40,062
2023		40,062
2024		40,062
2025		40,062
Thereafter		105,172
Total	$	305,482

Leases (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Disclosure Text Block [Abstract]

Schedule of the company performed evaluations of its contracts and determined that each of its identified leases

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Operating lease cost	$	435,487	$	67,896	$	870,975	$	135,791
Variable lease expense		147,412		6,508		294,825		12,215
Short-term lease expense		2,965		1,847		6,236		2,380
Total lease expense	$	585,864	$	76,251	$	1,172,036	$	150,386

	Year ended December 31, 2020
Operating lease cost	$	271,582
Variable lease expense		24,430
Short-term lease expense		9,060
Total lease expense	$	305,072

Schedule of the lease right of use assets and lease liabilities recognized in the balance sheets

	As of June 30, 2021
Right of use asset in other non-current assets	$	8,156,424

Other current liabilities	$	1,009,827
Other non-current liabilities		7,767,283
Total lease liability	$	8,777,110

	As of December 31, 2020
Right of use asset in other non-current assets	$	316,040

Other current liabilities		254,197
Other non-current liabilities		71,961
Total lease liability	$	326,158

Schedule of the maturities of the company’s operating lease liabilities

Remainder of 2021	$622,375
2022	1,561,154
2023	1,533,222
2024	1,580,157
2025	1,627,092
Thereafter	3,700,071
Total lease payments	10,624,071
Less: Imputed interest	(1,846,961)
Present value of lease liabilities	$8,777,110

2021	$	279,793
2022		67,045
Total lease payments		346,838
Less: Imputed interest		(20,680	)
Present value of lease liabilities	$	326,158

Year ending December 31,
2021	$	279,793
2022		67,045
2023 and thereafter		—
Total	$	346,838

Accrued Expenses (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Payables and Accruals [Abstract]

Schedule of accrued expenses

	June 30, 2021		December 31, 2020
Compensation expense	$	1,329,206	$	1,370,575
Legal and other professional services		2,006,422		268,266
Research and development projects		909,900		517,256
Offering costs		359,558		505,783
Payroll tax expense		327,809		327,734
Other current expense		352,769		74,266
Total	$	5,285,664	$	3,063,880

	December 31, 2020		December 31, 2019
Compensation expense	$	1,326,311	$	517,290
Other current expense		904,052		156,842
Offering costs		505,783		—
Payroll tax expense		327,734		37,332
Total	$	3,063,880	$	711,464

Loan Payable (Tables)

6 Months Ended

Jun. 30, 2021

Debt Disclosure [Abstract]

Schedule of company’s term loan payable

	June 30, 2021
Gross Term Loan	$	25,000,000
Less: Unamortized debt discount and issuance costs		(12,465,407	)
Promissory Notes	$	3,000,000
Net notes payable, (all current)	$	15,534,593

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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Stockholders' Equity and Stock-based Compensation (Tables) [Line Items]

Stockholders' Equity and Stock-based Compensation (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Schedule of reserved shares of Class A common Stock for issuance for the following purposes

Series Seed preferred stock		28,538,853
Series Seed-1 preferred stock		3,563,412
Series Seed-2 preferred stock		4,751,218
Series A preferred stock		61,962,132
Series A-1 preferred stock		32,301,028
Options outstanding under stock incentive plan		21,060,965
Options outstanding outside of stock incentive plan		545,454
Option available for grant under stock incentive plan		21,284,453
Common stock warrants		1,250,000
Preferred stock warrants		2,596,303
Total		177,853,818

Series Seed preferred stock		42,298,151
Series Seed-1 preferred stock		3,563,412
Series Seed-2 preferred stock		4,751,218
Series A preferred stock		61,962,132
Series A-1 preferred stock		32,301,028
FF preferred common stock		20,000,000
Class B common stock		70,000,000
Options outstanding under stock incentive plan		29,358,286
Options outstanding outside of stock incentive plan		545,454
Option available for grant under stock incentive plan		14,243,904
Common stock warrants		1,250,000
Preferred stock warrants		774,527
Total		281,048,112

Schedule of stock-based compensation expense related to options

	Shares Available for Option Grants Under Plan	Options Outstanding Under Plan		Non-Plan Options	Total Options		Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding as of December 31, 2020	14,243,904	29,358,286		545,454	29,903,740		$	0.05	8.5	$	130,563,848
Vested exercised	—	(1,256,772	)	—	(1,256,772	)
Forfeitures	7,040,549	(7,040,549	)		(7,040,549	)
Outstanding as of June 30, 2021	21,284,453	21,060,965		545,454	21,606,419		$	0.06	6.8	$	52,835,067
Exercisable as of June 30, 2021					11,556,046		$	0.06	5.9	$	28,276,913
Vested and expected to vest as of June 30, 2021					21,606,419		$	0.06	6.8	$	52,835,067

Schedule of stock-based compensation expense related to options

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Research and development expenses	$	65,783	$	38,298	$	133,688	$	74,967
Selling, general and administrative expenses		2,278,371		128,835		7,978,316		193,709
	$	2,344,154	$	167,133	$	8,112,004	$	268,676

Schedule of Assumptions Used to Determine Fair Value of Options Granted

	Six Months Ended June 30,
	2021	2020
Expected term (in years)	N/A		5.12 – 6.07
Risk-free interest rate	N/A		0.34% – 1.35%
Expected volatility	N/A		34.00% – 45.68%
Dividend yield	N/A		0.00%
Fair value on grant date	N/A	$	0.08 – $0.22

	December 30, 2019		January 1, 2019
Expected term (in years)	7.00		8.00
Risk-free interest rate	1.81	%	2.59	%
Expected volatility	32.97	%	27.72	%
Dividend yield	0.00	%	0.00	%

Schedule of preferred stock shares designated, issued, and outstanding

Preferred Stock	Shares Designated	Shares Issued and Outstanding	Liquidation Price		Dividend Rate
Series Seed Preferred	44,745,720	42,298,151	$	0.21392	$	0.01284
Series Seed-1 Preferred	3,563,412	3,563,412	$	0.14031	$	0.00842
Series Seed-2 Preferred	4,751,218	4,751,218	$	0.10524	$	0.00631
Series A Preferred	65,000,000	61,962,132	$	0.29050	$	0.01743
Series A-1 Preferred	32,301,028	32,301,028	$	0.23240	$	0.01394

Option Outside of Stock Plan [Member]

Stockholders' Equity and Stock-based Compensation (Tables) [Line Items]

Schedule of Assumptions Used to Determine Fair Value of Options Granted

	2019
Expected term (in years)	5.00
Risk-free interest rate	1.62	%
Expected volatility	35.30	%
Dividend yield	0.00	%

Options and RSAs Under Stock Plans [Member]

Stockholders' Equity and Stock-based Compensation (Tables) [Line Items]

Schedule of stock-based compensation expense related to options

	Shares Available for Option Grants Under Plan		Options Outstanding Under Plan		Non-Plan Options	Total Options		Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding as of December 31, 2018	19,325,958		9,500,000		—	9,500,000		$	—	9.41	$	375,000
Authorized for issuance	4,430,579		—		—	—			—
Granted	(15,098,969	)	15,098,969		545,454	15,644,423			0.06
Outstanding as of December 31, 2019	8,657,568		24,598,969		545,454	25,144,423			0.04	9.12		681,779
Authorized for issuance	13,250,000								—
Granted	(15,137,861	)	15,137,861		—	15,137,861			0.07
Vested exercised	—		(2,904,347	)	—	(2,904,347	)		0.03
Forfeitures	7,474,197		(7,474,197	)	—	(7,474,197	)		0.06
Outstanding as of December 31, 2020	14,243,904		29,358,286		545,454	29,903,740		$	0.05	8.49	$	130,563,848
Exercisable as of December 31, 2020						12,697,969		$	0.04	8.09	$	55,573,549
Vested and expected to vest as of December 31, 2020						29,903,740		$	0.05	8.49	$	130,563,848

Schedule of stock-based compensation expense related to options

	Year Ended December 31,
	2020		2019
Research and development expenses	$	183,420	$	39,153
Selling, general and administrative expenses		2,581,371		25,869
	$	2,764,791	$	65,022

Schedule of Assumptions Used to Determine Fair Value of Options Granted

	Year Ended December 31,
	2020	2019
Expected term (in years)	5.03 – 6.23	5.85 – 6.08
Risk-free interest rate	0.27% – 1.36%	2.45% – 2.54%
Expected volatility	34.00% – 51.78%	31.20% – 31.53%
Dividend yield	0.00%	0.00%
Fair value on grant date	$0.08 – $1.16	$0.02

Restricted Stock Awards [Member]

Stockholders' Equity and Stock-based Compensation (Tables) [Line Items]

Schedule of stock-based compensation expense related to options

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Research and development expenses	$	104	$	763	$	417	$	2,499
Selling, general and administrative expenses		—		102		—		335
	$	104	$	865	$	417	$	2,834

Schedule of restricted stock awards

	Restricted Shares			Weighted- Average Grant Date Fair Value Per Share		Weighted Average Remaining Vesting Period (in years)
Balance, December 31, 2020	$	177,084		$	0.01	0.70
Vested	$	(62,500	)	$	0.01
Balance, June 30, 2021	$	114,584		$	0.01	0.84

	Restricted Shares		Weighted Average Grant Date Fair Value Per Share		Weighted Average Remaining Vesting Period (in years)
Balance, December 31, 2018	1,625,000		$	0.01	2.57
Vested	(787,500	)		0.01
Balance, December 31, 2019	837,500			0.01	1.91
Vested	(660,416	)		0.01
Balance, December 31, 2020	177,084		$	0.01	0.70

Schedule of computation of basic and diluted net income (loss) per share

Basic and Diluted Net Income (Loss) Per Share	Three Months Ended June 30,						Six Months Ended June 30,
Basic and Diluted Net Income (Loss) Per Share	2021			2020			2021			2020
Numerator:
Net income (loss)	$	64,327,154		$	(9,152,223	)	$	128,997,958		$	(15,406,868	)
Less:
Decrease in fair value of SAFE notes		(100,802,979	)		—			(182,366,571	)		—
Decrease in fair value of warrants and warrant amortization		(4,447,683	)		—			(12,528,951	)		—
Undistributed loss allocated to common stockholders for diluted net loss per share	$	(40,923,508	)	$	(9,152,223	)	$	(65,897,564	)	$	(15,406,868	)
Denominator:
Denominator for basic net income (loss) per share – weighted average shares outstanding		71,901,904			86,222,804			80,593,815			90,717,435
Dilutive preferred shares outstanding		131,116,643			—			131,116,643			—
Dilutive options and unvested stock units outstanding		20,634,514			—			20,813,808			—
Dilutive warrants outstanding		2,514,905			—			2,533,015			—
Dilutive SAFE notes outstanding (shares not reserved)		50,526,529			—			50,526,529			—
Denominator for diluted net income (loss) per share – adjusted weighted average shares outstanding		276,694,495			86,222,804			285,583,810			90,717,435

Net loss per share – diluted	$	(0.15	)	$	(0.11	)	$	(0.23	)	$	(0.17	)

Schedule of stock-based compensation expense related to options

	Year Ended December 31,
	2020		2019
Research and development expenses	$	4,099	$	5,373
Selling, general and administrative expenses		2,273		2,491
	$	6,372	$	7,864

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of accounts for income taxes requires the use of asset and liability method

	2020			2019
US	$	(307,027,145	)	$	(15,754,427	)
Total	$	(307,027,145	)	$	(15,754,427	)

Schedule of net income tax provision

	2020		2019
Current:
State	$	800	$	800
Income tax provision	$	800	$	800

Schedule reconciliation of federal income tax rate and effective tax rate

	2020		2019
Statutory tax rate	21.00	%	21.00	%
State taxes, net of federal benefit	1.03		8.44
Research and development credits	0.35		4.53
Non-deductible expenses	(18.43	)	(1.92	)
Valuation allowance	(3.86	)	(30.92	)
Uncertain tax positions	(0.09	)	—
Other	—		(1.13	)
Effective tax rate	0	%	0	%

Schedule of deferred income taxes

	December 31, 2020			December 31, 2019
Deferred tax assets:
Start-up and organization costs	$	4,280,464		$	1,624,196
Accrued expenses and reserves		503,840			—
Stock-based compensation		170,770			5,072
Tax credit carryforwards		2,340,468			937,893
Net operating loss		8,811,628			3,178,391
Property and equipment		288,656			132,878
Intangible assets		14,386			5,041
Capitalized R&D costs		566,973			—
Operating lease obligations		91,271			—
Warrants		888,975			—
Other		—			142,012
Total deferred tax assets before valuation allowance		17,957,431			6,025,483
Valuation allowance		(17,868,548	)		(6,025,483	)
Total deferred tax assets		88,883			—
Deferred tax liabilities:
Operating lease right-of-use assets		(88,439	)		—
Other		(444	)		—
Total deferred tax liabilities		(88,883	)		—
Net deferred tax assets	$	—		$	—

Schedule of gross unrecognized tax benefits

	Gross Unrecognized Tax Benefits
Balance at December 31, 2019	$	312,631
Increases related to prior tax positions		—
Increases related to current tax positions		467,526
Balance at December 31, 2020	$	780,157

Fair Value Measurements (Tables) - Stable Road Acquisition Corp [Member]

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

Fair Value Measurements (Tables) [Line Items]

Schedule of fair value of held-to-maturity securities

		Held-To-Maturity		Amortized Cost			Gross Holding Gains			Fair Value
December 31, 2020		U.S.Treasury Securities		$	173,107,113		$	1,887		$	173,109,000

	Held-To-Maturity	Level	Amortized Cost		Gross Holding Gain		Fair Value
December 31, 2020	U.S. Treasury Securities (Mature on 1/5/2021)	1	$	173,107,113	$	1,887	$	173,109,000

December 31, 2019	U.S. Treasury Securities (Matured on 5/14/2020)	1	$	172,845,138	$	13,410	$	172,858,548

Schedule of liabilities that are measured at fair value on a recurring basis

	Quoted Prices in Active Markets
Description	Level	June 30, 2021
Assets:
Marketable securities held in Trust Account – U.S. Treasury Securities Money Market Fund	1	$	172,748,233

	Level	June 30, 2021	December 31, 2020
Liabilities:
Warrant Liability – Public Warrants	1	36,225,000	45,625,388
Warrant Liability – Private Placement Warrants	3	1,228,975	2,452,500

Liabilities:	Level	December 31, 2020	December 31, 2019
Warrant Liability – Public Warrants	1	45,625,388	7,331,250
Warrant Liability – Private Placement Warrants	3	2,452,500	525,925

Schedule of key inputs into the Black-Scholes model for the private placement warrants

Input	June 30, 2021			December 31, 2020
Risk-free interest rate		0.89	%		1.73	%
Holding period (years)		5.12			5.25
Volatility		25.00	%		25.00	%
Exercise price	$	11.50		$	11.50
Underlying value	$	13.97		$	9.50

Input	November 13, 2019 (Initial Measurement)
Risk-free interest rate		1.73	%
Holding period (years)		5.25
Volatility		25.00	%
Exercise price	$	11.50
Underlying value	$	9.50

Input	November 13, 2019 (Initial Measurement)
Risk-free interest rate		1.73	%
Holding period (days)		1,260
Volatility		25.00	%
Warrant redemption price	$	18.00

Input	December 31, 2020			December 31, 2019
Risk-free interest rate		0.31	%		1.74	%
Holding period (years)		5.25			5.25
Volatility		25.00	%		25.00	%
Exercise price	$	11.50		$	11.50
Underlying value	$	10.08		$	9.96

Schedule of private placement warrants and public warrants

	Private Placement
Fair value as of December 31, 2020	$	2,452,500
Change in valuation inputs or other assumptions		(1,223,525	)
Fair value as of June 30, 2021	$	1,228,975

	Private Placement		Public			Warrant Liabilities
Fair value – May 28, 2019	$	—	$	—		$	—
Initial measurement on November 13, 2019 (IPO)		455,075		13,541,250			13,996,325
Change in fair value		70,850		(6,210,000	)		(6,139,150	)
Transfers out of Level 3		—		(7,331,250	)		(7,331,250	)
Fair value as of December 31, 2019	$	525,925	$	—		$	525,925
Change in fair value		1,926,575		—			1,926,575
Fair value as of December 31, 2020	$	2,452,500	$	—		$	2,452,500

Restatement of Previously Issued Consolidated Financial Statements (Tables)

12 Months Ended

Dec. 31, 2020

Restatement of Previously Issued Consolidated Financial Statements (Tables) [Line Items]

Schedule of financial statement

	As Previously Reported			Adjustments			As Restated
Balance sheet as of November 13, 2019 (audited)
Warrant Liabilities	$	—		$	13,996,325		$	13,996,325
Total Liabilities		6,902,150			13,996,325			20,898,475
Class A Common Stock Subject to Possible Redemption		162,038,390			(13,996,330	)		148,042,060
Class A Common Stock		159			140			299
Additional Paid-in Capital		5,011,163			857,554			5,868,717
(Accumulated Deficit) Retained Earnings		(11,750	)		(857,689	)		(869,439	)
Total Stockholders’ Equity		5,000,003			5			5,000,008
Number of Class A common stock subject to redemption		16,203,839			(1,399,633	)		14,804,206

Balance sheet as of December 31, 2019 (audited)
Warrant Liabilities	$	—		$	7,857,175		$	7,857,175
Total Liabilities		7,095,309			7,857,175			14,952,484
Class A Common Stock Subject to Possible Redemption		162,112,500			(7,857,180	)		154,255,320
Class A Common Stock		158			78			236
Additional Paid-in Capital		4,937,054			(4,937,054	)		0
(Accumulated Deficit) Retained Earnings		62,359			4,936,981			4,999,340
Total Stockholders’ Equity		5,000,002			5			5,000,004

Balance sheet as of March 31, 2020 (unaudited)
Warrant Liabilities	$	—		$	6,907,475		$	6,907,475
Total Liabilities		7,240,139			6,907,475			14,147,614
Class A Common Stock Subject to Possible Redemption		162,371,970			(6,907,480	)		155,464,490
Class A Common Stock		156			69			225
Additional Paid-in Capital		4,677,586			(4,677,586	)		0
(Accumulated Deficit) Retained Earnings		321,830			4,677,522			4,999,352
Total Stockholders’ Equity		5,000,003			5			5,000,008

Balance sheet as of June 30, 2020 (unaudited)
Warrant Liabilities	$	—		$	5,721,775		$	5,721,775
Total Liabilities		7,038,476			5,721,775			12,760,251
Class A Common Stock Subject to Possible Redemption		162,408,340			(5,721,780	)		156,686,560
Class A Common Stock		155			57			212
Additional Paid-in Capital		4,641,217			(4,641,217	)		0
(Accumulated Deficit) Retained Earnings		358,202			4,641,165			4,999,367
Total Stockholders’ Equity		5,000,005			5			5,000,010

Balance sheet as of September 30, 2020 (unaudited)
Warrant Liabilities	$	—		$	10,424,088		$	10,424,088
Total Liabilities		6,989,141			10,424,088			17,413,229
Class A Common Stock Subject to Possible Redemption		162,243,730			(10,424,090	)		151,819,640
Class A Common Stock		157			104			261
Additional Paid-in Capital		4,805,825			61,046			4,866,871
Accumulated Deficit) Retained Earnings		193,592			(61,148	)		132,444
Total Stockholders’ Equity		5,000,005			2			5,000,007

	As Previously Reported			Adjustments			As Restated
Balance sheet as of December 31, 2020 (audited)
Warrant Liabilities	$	—		$	48,077,888		$	48,077,888
Total Liabilities		9,385,896			48,077,888			57,463,784
Class A Common Stock Subject to Possible Redemption		159,347,050			(48,077,890	)		111,269,160
Class A Common Stock		186			480			666
Additional Paid-in Capital		7,702,476			37,714,470			45,416,946
Accumulated Deficit		(2,703,091	)		(37,714,948	)		(40,418,039	)
Total Stockholders’ Equity		5,000,002			2			5,000,004

Statement of operations for period from May 28, 2019 (inception) through December 31, 2019 (audited)
Net income (loss)	$	62,359		$	5,281,461		$	5,343,820
Transaction Costs		—			(857,689	)		(857,689	)
Change in fair value of warrant liabilities		—			6,139,150			6,139,150
Basic net loss per share, Class A and Class B non-redeemable common stock		(0.03	)		1.31			1.28
Diluted net loss per share, Class A and Class B non-redeemable common stock		—			1.24			1.24

Statement of operations for the Three months ended March 31, 2020 (unaudited)
Net income (loss)	$	259,471		$	949,700		$	1,209,171
Change in fair value of warrant liabilities		—			949,700			949,700
Basic and diluted net income (loss) per share, Class A and Class B non-redeemable common stock		(0.04	)		0.20			0.16

Statement of operations for the Three months ended June 30, 2020 (unaudited)
Net income (loss)	$	36,372		$	1,185,700		$	1,222,072
Change in fair value of warrant liabilities		—			1,185,700			1,185,700
Basic and diluted net loss per share, Class A and Class B non-redeemable common stock		(0.05	)		0.24			0.19

Statement of operations for the Six months ended June 30, 2020 (unaudited)
Net income (loss)	$	295,843		$	2,135,400		$	2,431,243
Change in fair value of warrant liabilities		—			2,135,400			2,135,400
Basic and diluted net loss per share, Class A and Class B non-redeemable common stock		(0.09	)		0.44			0.35

Statement of operations for the Three months ended September 30, 2020 (unaudited)
Net income (loss)	$	(164,610	)	$	(4,702,313	)	$	(4,866,923	)
Change in fair value of warrant liabilities		—			(4,702,313	)		(4,702,313	)
Basic and diluted net loss per share, Class A and Class B non-redeemable common stock		(0.04	)		(0.96	)		(1.00	)

	As Previously Reported			Adjustments			As Restated
Statement of operations for the Nine months ended September 30, 2020 (unaudited)
Net income (loss)	$	131,233		$	(2,566,913	)	$	(2,435,680	)
Change in fair value of warrant liabilities		—			(2,566,913	)		(2,566,913	)
Basic and diluted net loss per share, Class A and Class B non-redeemable common stock		(0.13	)		(0.53	)		(0.66	)

Statement of operations for the Year ended December 31, 2020 (audited)
Net income (loss)	$	(2,765,450	)	$	(40,220,713	)	$	(42,986,163	)
Change in fair value of warrant liabilities		—			(40,220,713	)		(40,220,713	)
Basic and diluted net loss per share, Class A and Class B non-redeemable common stock		(0.72	)		(8.28	)		(9.00	)

Statements of Cash Flows for the Period ended December 31, 2019 (audited)
Net income (loss)	$	62,359		$	5,281,461		$	5,343,820
Transaction costs allocable to warrant liabilities		—			857,689			857,689
Change in fair value of warrant liabilities		—			(6,139,150	)		(6,139,150	)

Statements of Cash Flows for the Three months ended March 31, 2020 (unaudited)
Net income (loss)	$	259,471		$	949,700		$	1,209,171
Change in fair value of warrant liabilities		—			(949,700	)		(949,700	)

Statements of Cash Flows for the Six months ended June 30, 2020 (unaudited)
Net income (loss)	$	295,843		$	2,135,400		$	2,431,243
Change in fair value of warrant liabilities		—			(2,135,400	)		(2,135,400	)

Statements of Cash Flows for the Nine months ended September 30, 2020 (unaudited)
Net income (loss)	$	131,233		$	(2,566,913	)	$	(2,435,680	)
Change in fair value of warrant liabilities		—			2,566,913			2,566,913

Statements of Cash Flows for the Year ended December 31, 2020 (audited)
Net income (loss)	$	(2,765,450	)	$	(40,220,713	)	$	(42,986,163	)
Change in fair value of warrant liabilities		—			40,220,713			40,220,713

Income Tax (Tables) - Stable Road Acquisition Corp [Member]

12 Months Ended

Dec. 31, 2020

Income Tax (Tables) [Line Items]

Schedule of net deferred tax assets

	December 31,
	2020			2019
Deferred tax asset
Organizational costs/Startup expenses	$	763,877		$	24,483
Total deferred tax asset		763,877			24,483
Valuation allowance		(763,877	)		(24,483	)
Deferred tax asset, net of allowance	$	—		$	—

Schedule of net income tax provision

	December 31,
	2020			2019
Federal
Current	$	178,866		$	47,567
Deferred		(739,394	)		(24,483	)

State
Current	$	—		$	—
Deferred		—			—
Change in valuation allowance		739,394			24,483
Income tax provision	$	178,866		$	47,567

Schedule reconciliation of federal income tax rate and effective tax rate

	December 31,
	2020		2019
Statutory federal income tax rate	21.0	%	21.0	%
Change in fair value of warrant liability	(19.7	)%	(23.9	)%
Transaction costs allocable to warrant liabilities	—		3.3	%
Change in valuation allowance	(1.7	)%	0.5	%
Income tax provision	(0.4	)%	0.9	%

Nature of Operations (Details)	6 Months Ended
Nature of Operations (Details)	Jun. 30, 2021
Accounting Policies [Abstract]
Description of merger agreement	The Merger Agreement was further amended on March 5, 2021, April 6, 2021 and June 29, 2021, respectively, such that the aggregate merger consideration payable to the holders of Momentus equity interests (including convertible securities) will be paid in shares of the newly issued Combined Company Class A common stock (or securities exercisable for Combined Company Class A common stock) having a value equal to $566,600,000 subject to certain adjustments as set forth in the Merger Agreement as amended.

Summary of Significant Accounting Policies (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	May 21, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2021	Jun. 29, 2021	Jan. 01, 2020
Summary of Significant Accounting Policies (Details) [Line Items]
Non-affiliates exceeds		$ 700,000,000		$ 700,000,000
Gross revenue		1,070,000,000.00		1,070,000,000.00
Non-convertible debt		1,000,000,000		1,000,000,000
Letter of credit issued						$ 515,000
Current asset		(100,000)		(100,000)		100,000
Non current asset		415,000		415,000		415,000
Current liabilities		3,074,940		3,074,940
Non-current liabilities						2,624,824
Non-current deposits		1,610,740		1,610,740
Customer cancelled contracts		130,000		130,000		365,000
Cost of revenue				48,400		367,622
Customer refunds								$ 1,500,000
Deferred fulfillment				2,950,000		4,650,000
Prepaid launch costs						4,650,000
Prior payments	$ 8,700,000
Current prepaid launch costs		8,700,000		8,700,000
Advertising expenses		0	$ 572	3,548	$ 37,353	92,861	124,250
Offering costs		4,332,577		4,332,577
Accrued expenses, accounts payable, and loan payable		1,870,053		1,870,053
Offering costs						2,104,241
Accrued expenses						505,783
Capitalized implementation costs		26,149		26,149
Operating lease ROU assets										$ 545,707
Operating lease liabilities		8,777,110		8,777,110		326,158				$ 555,916
Customer deposits						2,624,824
Contract loss contingencies						183,811
Deferred fulfillment and prepaid launch costs						$ 1,500,000	$ 3,535,550
Prepaid launch costs, description						Of the $1,500,000 prepaid launch costs expensed, approximately $184,000 was recorded as cost of revenue and approximately $1,316,000 was recorded as research and development expenses for the year ended December 31, 2020.
Loss contract contingencies						$ 183,811
Reserve for future launches						$ 183,811
Deferred offering costs, description						During the year ended December 31, 2020 the Company incurred offering costs of $2,610,024. As of December 31, 2020, the Company has recorded $2,610,024 of offering costs as a current asset. As of December 31, 2020, $2,104,214 of the offering costs have been paid and $505,783 have been recorded in accrued expenses.
Deferred Offering Costs [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Non current asset		$ 6,202,630		6,202,630		$ 2,610,024
Stable Road Acquisition Corp [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Offering costs						10,924,857
Charged to stockholders’ equity						10,067,168
Warrants expenses						857,689
Federal depository insurance coverage				$ 250,000		$ 250,000
Share price (in Dollars per share)		$ 11.69		$ 15.39
National Security Agreement [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Restricted expenditures		$ 1,000,000		$ 1,000,000
Merger Agreement [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Restricted amendment									$ 300,000
Class A Common Stock [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Warrant affiliate (in Shares)						5,000,000
Class A Common Stock [Member] \| Stable Road Acquisition Corp [Member]
Summary of Significant Accounting Policies (Details) [Line Items]
Common stock subject to possible redemptions (in Shares)		11,395,368		11,395,368		11,126,916	15,425,532
Placement units to purchase (in Shares)				8,897,500		8,897,500

Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series Seed preferred stock	$ 28	$ 42	$ 42
Series A preferred stock	62	62	62
Total	222,473,383	196,804,208	191,270,364
Series Seed preferred stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series Seed preferred stock	42,298,151	42,298,151	42,298,151
Series Seed-1 preferred stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series Seed-1 preferred stock	3,563,412	3,563,412	3,563,412
Series Seed-2 preferred stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series Seed-2 preferred stock	4,751,218	4,751,218	4,751,218
Series A preferred stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series A preferred stock	61,962,132	61,962,132	61,962,132
Series A-1 preferred stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series A-1 preferred stock	32,301,028
FF preferred common stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
FF preferred stock	20,000,000
Options outstanding under stock incentive plan [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Options outstanding under stock incentive plan	35,538,222	29,358,286	24,598,969
Options outstanding outside of stock incentive plan [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Options outstanding outside of stock incentive plan	545,454	545,454	545,454
Common stock warrants [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Common stock warrants	1,250,000	1,250,000	1,250,000
Preferred stock warrants [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Preferred stock warrants	774,527	$ 774,527
SAFE notes outstanding [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
SAFE notes outstanding (shares not reserved)	$ 19,489,239

Prepaids and Other Current Assets (Details) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
Prepaids and Other Current Assets (Details) - USD ($)	May 21, 2021	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Text Block Supplement [Abstract]
Prepaid launch costs			$ 2,150,000	$ 2,390,000
Default of prior payments	$ 8,700,000
Impairment charge		$ 8,700,000
Prepaid launch costs				$ 2,390,000	$ 1,932,050

Prepaids and Other Current Assets (Details) - Schedule of prepaids and other current assets - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of prepaids and other current assets [Abstract]
Prepaid launch costs, current	$ 800,000	$ 2,260,000	$ 1,603,500
Prepaid research and development	3,819,756	1,452,557	$ 109,264
Prepaid insurance and other assets	1,121,785	795,727
Total	$ 5,741,542	$ 4,508,284

Property, Machinery and Equipment, net (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Depreciation expense to property, machinery and equipment	$ 236,538	$ 136,229	$ 425,491	$ 252,036	$ 556,677	$ 188,134

Property, Machinery and Equipment, net (Details) - Schedule of property, machinery and equipment, net - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of property, machinery and equipment, net [Abstract]
Computer equipment	$ 177,868	$ 177,868	$ 109,586
Furniture and fixtures	205,976	205,976	131,891
Leasehold improvements	897,529	665,146	461,280
Machinery and equipment	2,800,170	1,935,974	1,079,184
Construction in-progress	1,913,308	117,655	229,983
Total assets	5,994,851	3,102,619	2,011,924
Less: accumulated depreciation	(1,207,172)	(781,519)	(224,842)
Property, machinery and equipment, net	$ 4,787,679	$ 2,321,100	$ 1,787,082

Intangible Assets, net (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
Intangible Assets, net (Details) - USD ($)	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense related to intangible assets	$ 12,111	$ 8,223	$ 22,496	$ 15,215	$ 33,393	$ 15,369

Intangible Assets, net (Details) - Schedule of Intangible assets, net - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Schedule of Intangible assets, net [Abstract]
Gross Value, Patents/Intellectual Property	$ 395,499	$ 356,890
Accumulated Amortization, Patents/Intellectual Property	(73,904)	(51,408)
Net Value, Patents/Intellectual Property	$ 321,595	$ 305,482
Weighted average remaining amortization period (in years), Patents/Intellectual Property	7 years 5 months 26 days	7 years 7 months 13 days

Intangible Assets, net (Details) - Schedule of estimated amortization expense related to intangible assets - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Schedule of estimated amortization expense related to intangible assets [Abstract]
2021 (remainder)	$ 23,602	$ 40,062
2022	47,204	40,062
2023	47,204	40,062
2024	41,444	40,062
2025	38,487	40,062
Thereafter	123,654	105,172
Total	$ 321,595	$ 305,482

Leases (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
Leases (Details) - USD ($)	Jan. 31, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Disclosure Text Block [Abstract]
Lease expires date	2028-02
Obligated to pay over the term of lease	$ 11,000,000
Rent expense		$ 435,487	$ 67,896	$ 870,975	$ 135,791	$ 305,072
Operating lease term, description						The Company leases office space under non-cancellable operating leases with terms expiring in December 2021 and February 2028. The leases require monthly lease payments that are subject to annual increase throughout the lease term.

Leases (Details) - Schedule of the company performed evaluations of its contracts and determined that each of its identified leases - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Schedule of the company performed evaluations of its contracts and determined that each of its identified leases [Abstract]
Operating lease cost	$ 435,487	$ 67,896	$ 870,975	$ 135,791	$ 271,582
Variable lease expense	147,412	6,508	294,825	12,215	24,430
Short-term lease expense	2,965	1,847	6,236	2,380	9,060
Total lease expense	$ 585,864	$ 76,251	$ 1,172,036	$ 150,386	$ 305,072

Leases (Details) - Schedule of the lease right of use assets and lease liabilities recognized in the balance sheets - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Schedule of the lease right of use assets and lease liabilities recognized in the balance sheets [Abstract]
Right of use asset in other non-current assets	$ 8,156,424
Other current liabilities	1,009,827	$ 254,197
Other non-current liabilities	7,767,283	71,961
Total lease liability	$ 8,777,110	$ 326,158

Leases (Details) - Schedule of the maturities of the company’s operating lease liabilities - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Jan. 01, 2020
Schedule of the maturities of the company’s operating lease liabilities [Abstract]
Remainder of 2021	$ 622,375	$ 279,793
2022	1,561,154	67,045
2023	1,533,222
2024	1,580,157
2025	1,627,092
Thereafter	3,700,071
Total lease payments	10,624,071	346,838
Less: Imputed interest	(1,846,961)	(20,680)
Present value of lease liabilities	$ 8,777,110	$ 326,158	$ 555,916

Accrued Expenses (Details) - Schedule of accrued expenses - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Schedule of accrued expenses [Abstract]
Compensation expense	$ 1,329,206	$ 1,370,575
Legal and other professional services	2,006,422	268,266
Research and development projects	909,900	517,256
Offering costs	359,558	505,783
Payroll tax expense	327,809	327,734
Other current expense	352,769	74,266
Total	$ 5,285,664	$ 3,063,880

Safe Notes (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
Safe Notes (Details) - USD ($)	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Jun. 29, 2021
Safe Notes (Details) [Line Items]
Aggregate proceeds amount			$ 30,852,687		$ 44,650,000
Estimated fair value amount			162,925,780		314,439,663	$ 2,500,000
Estimated fair value income (loss)	$ 100,802,979	$ (3,586,605)	182,366,571	$ (3,587,989)
Total principal amount			$ 78,002,687	$ 47,150,000	47,150,000	$ 2,500,000
Conversion shares discount percentage			20.00%			20.00%
Valuation cap						$ 150,000,000	$ 1,200,000,000
Valuation cap amount			$ 566,600,000
Expense reported					267,289,663
Incurred fees					1,000,000.0
Safe notes total						$ 7,506,760
preferred stock (in Shares)						32,301,028
Converted Safe notes total						$ 568,479
Minimum [Member]
Safe Notes (Details) [Line Items]
Total principal amount					9,650,000
Valuation cap					150,000,000
Maximum [Member]
Safe Notes (Details) [Line Items]
Total principal amount					35,000,000
Valuation cap					$ 300,000,000

Loan Payable (Details)		1 Months Ended			3 Months Ended		6 Months Ended		12 Months Ended
Loan Payable (Details)	Sep. 01, 2020	Jun. 29, 2021 USD ($)	Feb. 22, 2021 USD ($)	May 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Mar. 01, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 09, 2020 USD ($)
Loan Payable (Details) [Line Items]
Unused borrowing capacity amount					$ 15,000,000		$ 15,000,000				$ 4,500,000
Term loan warrants, description							warrants to purchase preferred stock up to 1% of the fully diluted capitalization (including allowance for conversion of all outstanding convertible notes, SAFE notes and such warrants) of the Company were granted to the lender exercisable at the lender’s option. 80% of the 1% of the warrants were earned by the lender at the completion of the agreement. The additional 20% of the warrants was forfeited as of June 30, 2021. The stock purchase warrant expires on June 30, 2031. The warrant’s original estimated fair value of $15,647,538 was recorded as a derivative liability under ASC 815, Derivatives and Hedging, with the offset recorded as a debt discount. See also Note 10 for discussion on the valuation and recording of the warrants as of June 30, 2021
Debt issuance cost					143,705		$ 143,705
Interest expense amortization					2,633,820	$ 14,552	3,350,491	$ 18,192
Aggregate amount of convertible notes payable					$ 15,647,538		$ 15,647,538
Convertible notes exceeds percentage							63.00%
Effective interest rate percentage					125.97%		125.97%
Equipment loan borrow up amount					$ 4,500,000		$ 4,500,000
Equipment loan fixed interest rate percentage					9.75%		9.75%				9.75%
Borrwings under equipment loan											$ 4,500,000	$ 1,536,772
Original issuance discount amount							$ 49,000		$ 49,000
Principal amount	$57,929								$1,536,772
Equipment loan preferred stock, description							a stock purchase warrant was also issued to the lender, which allows for the purchase of Series A Preferred Stock or Preferred Stock in a subsequent round of financing in an amount of $225,000. Under the stock purchase warrant agreement, the lender is also provided the right to invest up to an additional $250,000 in the Company’s equity or convertible debt issued in future offerings. The lender exercised this right with the SAFE notes issued in February 2021. The stock purchase warrant expires on March 9, 2030. The warrant’s original estimated fair value of $29,415 was recorded as a derivative liability under ASC 815, Derivatives and Hedging, with the offset recorded as a debt discount (See Note 10).		a stock purchase warrant was also issued to the lender, which allows for the purchase of a number of shares of Series A Preferred Stock (or, subject to certain conditions, Preferred Stock in a subsequent round of financing) equal to $225,000 divided by the price per share in the applicable round of financing. Under the warrant agreement, the lender is also provided certain rights to invest up to an additional $250,000 in the Company’s equity or convertible debt issued in future offerings. The warrant expires on March 9, 2030. The original fair value of the warrant of $29,415 was recorded as a derivative liability with the offset recorded as a debt discount (See Note 10).
Debt issuance cost of equipment loan					$ 37,659		$ 37,659		$ 37,659
Warrant discount and debt issuance cost									67,537
Promisssory note amount		$ 1,500,000
Interest rate of prime plus		2.00%
Number of business days											(10)
Debt Instrument, Convertible, Number of Equity Instruments	250,000
Warrant discount and debt issuance cost									$ 116,074
Term loan [Member]
Loan Payable (Details) [Line Items]
Maximum term loan available			$ 40,000,000							$ 25,000,000
Annual interest rate			12.00%
PPP Loan [Member]
Loan Payable (Details) [Line Items]
PPP loan amount				$ 970,000
PPP loan bears interest rate percentage				1.00%

Loan Payable (Details) - Schedule of company’s term loan payable	Jun. 30, 2021 USD ($)
Schedule of company’s term loan payable [Abstract]
Gross Term Loan	$ 25,000,000
Less: Unamortized debt discount and issuance costs	(12,465,407)
Promissory Notes	3,000,000
Net notes payable, (all current)	$ 15,534,593

Stockholders' Equity and Stock-based Compensation (Details) - USD ($)		1 Months Ended										2 Months Ended	3 Months Ended		6 Months Ended		7 Months Ended	12 Months Ended
	Oct. 05, 2020	May 22, 2021	Feb. 28, 2021	Jan. 25, 2021	Sep. 24, 2020	Jun. 15, 2020	Mar. 31, 2020	Mar. 25, 2020	Dec. 30, 2019	Nov. 30, 2019	Nov. 01, 2018	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	May 31, 2018
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Stockholders’ equity and stock-based compensation discerption															In accordance with the NSA and pursuant to certain Repurchase Agreements entered into with the Company, effective as of June 8, 2021, each of Mr. Kokorich, Nortrone Finance S.A. and Brainyspace LLC (collectively “Co-Founders”) sold 100% of their respective equity interests in the Company on June 30, 2021. These equity interests consisted of Class B Common Stock (70,000,000 shares with par value of $70), FF Preferred Stock (20,000,000 shares with par value of $20), Series Seed Preferred Stock (13,759,298 shares with par value of $14), and Class A Common Stock Options (5,078,750 options). In exchange for these shares and options, the Company initially paid each entity $1, but will additionally pay up to an aggregate of $50,000,000, out of funds legally available therefor, to Mr. Kokorich, Nortrone Finance S.A. and Brainyspace LLC, on a pro rata basis, as follows: (i) an aggregate of $40,000,000 to be paid out of funds legally available therefor, within 10 business days after the earlier of (A) a business combination or capital raising transaction or series of transactions (whether in the form of debt or equity) resulting in cash proceeds of no less than $100,000,000 and (B) the Business Combination (the “First Payment Date”); and (ii) an aggregate of $10,000,000 to be paid out of funds legally available therefor, within 10 business days after a business combination or capital raising transaction or series of transactions (whether in the form of debt or equity) resulting in cash proceeds of no less than $250,000,000 (determined without any reduction for the $100,000,000 previously received in respect of the First Payment Date).
Treasury stock, value (in Dollars)													$ 3		$ 3
Additional consideration to be paid (in Dollars)															22,000,001
Stock purchase warrants, description			the Company entered into the Term Loan to provide the Company up to $40,000,000 of working capital. In conjunction with the Term Loan, warrants up to 1% of the fully diluted capitalization (including allowance for conversion of all outstanding convertible notes, SAFE notes and such warrants) of the Company were granted to the lender exercisable at the lender’s option. 80% of the 1% of the warrants were earned by the lender at the completion of the agreement. The remaining 20% of the warrants was forfeited as of June 30, 2021. The stock purchase warrant expires on June 30, 2031. The warrant’s original estimated fair value of $15,647,538 was recorded as a derivative liability under ASC 815, Derivatives and Hedging, with the offset recorded as a debt discount. The Company recorded the decrease in the estimated fair value of the warrant of $(4,056,962) and $(11,057,697) for the three and six months ended June 30, 2021, respectively, to reflect the value of the warrant of $4,589,843 as of June 30, 2021.
Borrowings (in Dollars)							$ 4,500,000					$ 4,500,000
Financing amount (in Dollars)							225,000					225,000
Convertible debt issue (in Dollars)							250,000					$ 250,000
Fair value of warrant (in Dollars)							$ 29,415						397,362		1,479,349
Value of the warrant (in Dollars)															1,726,835
Shares, Issued							37,006,537					37,006,537
Subject to awards outstanding												11,650,000
Intrinsic value of options exercisable (in Dollars)															$ 28,276,913	$ 345,987
Unrecognized compensation expenses (in Dollars)														$ 1,180,467		$ 1,180,467		$ 1,792,406
Weighted-average period															10 months 2 days	2 years 1 month 28 days
Stock-based compensation expense															114,584
Unrecognized compensation cost related to unvested (in Dollars)															$ 1,042
Number of shares vested											40,000,000				62,500		787,500	660,416
Risk-free rate								0.19%
Expected volatility								41.00%							57.00%
Fair value per share (in Dollars per share)								$ 0.09							$ 1.959
Options totaled (in Dollars)								$ 16,742					$ 1,175,450		$ 1,175,450
Restricted stock award	197,917			1,058,074				189,167
Exercise price (in Dollars per share)								$ 0.07
Forfeiture of options								970,833
Compensation expense (in Dollars)								$ 4,631
Compensation expense description						the Company modified an option award for an employee, which resulted in the vesting acceleration of 78,125 shares underlying such option award. This Type I modification resulted in incremental compensation expense of $703.
Total compensation expense (in Dollars)															9,845
Selling, general and administrative expenses (in Dollars)															$ 2,970
Forfeiture shares underlying description					the Company modified an option award for an employee, which resulted in the forfeiture of 4,000,000 shares underlying such option award, the vesting acceleration of 600,000 shares underlying such option award, and the continued vesting of 400,000 shares underlying such option award over a four-month period. This modified option award has an exercise price of $0.07 per share, expected term of approximately one year, a risk-free
Interest rate															0.12%
Compensation expense (in Dollars)															$ 21,003
compensation expense recognized (in Dollars)															$ 783,637
Incremental compensation expense (in Dollars)	$ 399,594
outstanding preferred shares													0	222,500,000	0	222,500,000
Common stock, voting rights																		Preferred stock shareholders are entitled to one vote per share of Class A common stock that they would then convert into.
Exchange agreements, description											the Company entered into exchange agreements with Mikhail Kokorich (its then current Chief Executive Officer, “CEO”) and a related entity of a co-founder (the Company’s two founding shareholders), whereby 100,000,000 fully vested shares of then-outstanding common stock were reconstituted into 80,000,000 shares of Class B common stock and 20,000,000 shares of FF preferred stock, with the Company’s CEO and the related entity each holding 40,000,000 shares of Class B common stock and 10,000,000 shares of FF preferred stock, respectively.
Number of vested years											4 years
Shares authorised											578,761,378
Common stock, par value (in Dollars per share)											$ 0.000001
Gross proceeds (in Dollars)																		$ 75,000,000
Preferred shares voting rights, description																		FF Preferred shareholders are entitled to one vote per share.
Borrowing amount (in Dollars)							$ 4,500,000					$ 4,500,000	$ 15,000,000		$ 15,000,000
Stock purchase warrants, description							Stock in a subsequent round of financing) equal to $225,000 divided by the price per share in the applicable round of financing. Under the warrant agreement, the lender is also provided certain rights to invest up to an additional $250,000 in the Company’s equity or convertible debt issued in certain future offerings. The stock warrant expires on March 9, 2030 and is accounted for at fair value as a derivative liability. The valuation of the warrant was determined through the use of a Black Scholes options model, with a calculated fair value of $29,415 at the issuance date. The Company recorded the increase in the fair value of the warrant of $3,176,770 for the year ended December 31, 2020, in other income (expense) within the accompanying statements of operations. Additionally, there was an immaterial amount of deferred issuance costs allocated to the warrants.
Warrant term modification, description									the Company modified the terms of the original warrant. A total of 1,250,000 warrant shares became immediately vested and the remaining 3,750,000 warrant shares were forfeited. The Company accounted for the modification as a Type III modification, which resulted in a re-measured fair value per share of $0.035 and the recognition of incremental compensation expense of $19,601. A total of $43,299 of compensation expense was recognized from the grant date through December 31, 2019 and is included within selling, general and administrative expenses in the accompanying statements of operations.
Selling, general and administrative expenses (in Dollars)														$ 102		$ 335
Weighted-average period unvested																		2 years 4 months 13 days
Research and development expenses (in Dollars)													$ 20,794,056	$ 3,963,236	$ 30,700,331	$ 8,380,801		$ 22,718,272	$ 9,837,323
Restricted Stock Awards [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Unrecognized compensation expenses (in Dollars)																		$ 1,667
Weighted-average period unvested																		1 year 3 months 29 days
Number of shares were subject to repurchase																		177,084
Stock Option Modifications [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Selling, general and administrative expenses (in Dollars)																		$ 2,970
Forfeiture of options					4,000,000			970,833
Number of acceleration of options vested	197,917				600,000	78,125		189,167
Exercise price per share (in Dollars per share)					$ 0.07			$ 0.07
Expected term					1 year			1 year
Risk-free interest rate					0.12%			0.19%
Expected volatility					57.00%			41.00%
Expected dividends								0.00%
Re-measured fair value per share (in Dollars per share)					$ 2,029			$ 0.09
Compensation expense reversed (in Dollars)					$ 76,781			$ 4,630
incremental compensation expense (in Dollars)	$ 399,594				$ 783,637	$ 703		$ 16,742
Research and development expenses (in Dollars)																		$ 9,845
Number of options vesting continued					400,000
Incremental compensation expense related to accelerated options (in Dollars)					$ 1,175,450
Stable Road Acquisition Corp [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
outstanding preferred shares
Preferred stock, shares authorized													1,000,000		1,000,000		1,000,000	1,000,000	1,000,000
Preferred stock, par value (in Dollars per share)													$ 0.0001		$ 0.0001		$ 0.0001	$ 0.0001	$ 0.0001
Director [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Number of shares vested		833,334
Exercise price (in Dollars per share)		$ 0.07
Risk-free rate		0.04%
Expected volatility		65.00%
Fair value per share (in Dollars per share)		$ 2.66
Options totaled (in Dollars)		$ 2,220,025
Chief Executive Officer [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Risk-free rate				0.10%
Expected volatility				78.00%
Fair value per share (in Dollars per share)				$ 5.16
Options totaled (in Dollars)				$ 5,448,107
Series A Preferred Stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Stock purchase							774,527
Warrants to purchase shares							774,527					774,527
Class A Common Stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Common stock, shares issued																				30,975,958
Stock plan issued																			4,430,579
Common stock, voting rights																		Class A Common shareholders are entitled to one vote per share.
Warrants to purchase shares																				5,000,000
Reserved for future issuance																					30,975,958
Class A Common Stock [Member] \| Stable Road Acquisition Corp [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Common stock, shares issued													6,379,970		6,379,970		2,369,468	6,668,084	2,369,468
Common stock, shares authorized													100,000,000		100,000,000		100,000,000	100,000,000	100,000,000
Common stock, par value (in Dollars per share)													$ 0.0001		$ 0.0001		$ 0.0001	$ 0.0001	$ 0.0001
Common stock, voting rights															Holders of Class A common stock are entitled to one vote for each share			Holders of Class A common stock are entitled to one vote for each share
Common stock, shares outstanding													6,379,970		6,379,970		2,369,468	6,668,084	2,369,468
Shares of common stock subject to possible redemption													11,395,368		11,395,368		15,425,532	11,126,916	15,425,532
Class B Common Stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Common stock, voting rights																		Class B Common shareholders are entitled to ten votes per share.
Class B Common Stock [Member] \| Stable Road Acquisition Corp [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Common stock, shares issued													4,312,500		4,312,500		4,312,500	4,312,500	4,312,500
Common stock, shares authorized													10,000,000		10,000,000		10,000,000	10,000,000	10,000,000
Common stock, par value (in Dollars per share)													$ 0.0001		$ 0.0001		$ 0.0001	$ 0.0001	$ 0.0001
Common stock, voting rights															Holders of Class B common stock are entitled to one vote for each share			Holders of Class B common stock are entitled to one vote for each share
Common stock, shares outstanding													4,312,500		4,312,500		4,312,500	4,312,500	4,312,500
Common stock converted percentage															20.00%			20.00%
Minimum [Member] \| Chief Executive Officer [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Exercise price (in Dollars per share)				$ 0.01
Maximum [Member] \| Chief Executive Officer [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Exercise price (in Dollars per share)				$ 0.07
New 2018 Stock Plan [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Reserved for future issuance																					4,430,579
Amended Plan and Restated 2018 Stock Plan [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Stock incentive plan, description																		In February and March 2020, the Board approved an amendment and restatement to the New 2018 Stock Plan (the “Amended Plan and Restated 2018 Stock Plan”), and further amendments thereto that increased the number of shares that may be issued thereunder to 37,006,537 plus any additional shares, capped at 11,650,000, subject to awards outstanding as of October 30, 2018 and issued under the Initial Plan that are forfeited to, or repurchased by the Company. The Amended and Restated 2018 Stock Plan expires on October 30, 2028, unless terminated earlier.
Option Outside of Stock Plan [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Weighted-average period unvested (in Dollars per share)										$ 0.02
Option Outside of Stock Plan [Member] \| Class A Common Stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Number of shares exercisable										545,454
Selling, general and administrative expenses (in Dollars)										$ 12,803
Warrant [Member]
Stockholders' Equity and Stock-based Compensation (Details) [Line Items]
Exerise price per share (in Dollars per share)																				$ 0.05
Grant date fair value (in Dollars per share)																				$ 0.019

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes - shares	Jun. 30, 2021	Dec. 31, 2020
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	177,853,818	281,048,112
Series Seed preferred stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	28,538,853	42,298,151
Series Seed-1 preferred stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	3,563,412	3,563,412
Series Seed-2 preferred stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	4,751,218	4,751,218
Series A preferred stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	61,962,132	61,962,132
Series A-1 preferred stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	32,301,028
Options outstanding under stock incentive plan [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	21,060,965	29,358,286
Options outstanding outside of stock incentive plan [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	545,454	545,454
Option available for grant under stock incentive plan [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	21,284,453	14,243,904
Common stock warrants [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	1,250,000	1,250,000
Preferred stock warrants [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common Stock for issuance for the following purposes [Line Items]
Total	2,596,303	774,527

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of options activity	6 Months Ended
	Jun. 30, 2021 USD ($) $ / shares shares
Schedule of options activity [Abstract]
Shares Available for Option Grants Under Plan, Outstanding Beginning Balance	14,243,904
Options Outstanding Under Plan, Outstanding Beginning Balance	29,358,286
Non-Plan Options, Outstanding Beginning Balance	545,454
Total Options, Outstanding Beginning Balance	29,903,740
Weighted- Average Exercise Price Per Share, Outstanding Beginning Balance (in Dollars per share) \| $ / shares	$ 0.05
Weighted- Average Remaining Contractual Term (in years), Outstanding Beginning Balance	8 years 6 months
Aggregate Intrinsic Value, Outstanding Beginning Balance (in Dollars) \| $	$ 130,563,848
Shares Available for Option Grants Under Plan, Vested exercised
Options Outstanding Under Plan, Vested exercised	(1,256,772)
Non-Plan Options, Vested exercised
Aggregate Intrinsic Value, Total Options, Vested exercised	(1,256,772)
Shares Available for Option Grants Under Plan, Forfeitures	7,040,549
Options Outstanding Under Plan, Forfeitures	(7,040,549)
Aggregate Intrinsic Value, Total Options, Forfeitures	(7,040,549)
Shares Available for Option Grants Under Plan, Outstanding Ending Balance	21,284,453
Options Outstanding Under Plan, Outstanding Ending Balance	21,060,965
Non-Plan Options, Outstanding Ending Balance	545,454
Total Options, Outstanding Ending Balance	21,606,419
Weighted- Average Exercise Price Per Share, Outstanding Ending Balance (in Dollars per share) \| $ / shares	$ 0.06
Weighted- Average Remaining Contractual Term (in years), Outstanding Ending Balance	6 years 9 months 18 days
Aggregate Intrinsic Value, Outstanding Ending Balance (in Dollars) \| $	$ 52,835,067
Total Options, Exercisable	11,556,046
Weighted- Average Exercise Price Per Share, Exercisable (in Dollars per share) \| $ / shares	$ 0.06
Weighted- Average Remaining Contractual Term (in years), Exercisable	5 years 10 months 24 days
Aggregate Intrinsic Value, Exercisable (in Dollars) \| $	$ 28,276,913
Total Options, Vested and expected to vest	21,606,419
Weighted- Average Exercise Price Per Share, Vested and expected to vest	0.06
Weighted- Average Remaining Contractual Term (in years), Vested and expected to vest	6 years 9 months 18 days
Aggregate Intrinsic Value, Vested and expected to vest (in Dollars) \| $	$ 52,835,067

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of stock-based compensation expense related to options - Options and RSAs Under Stock Plans [Member] - USD ($)	3 Months Ended		6 Months Ended		7 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of stock-based compensation expense related to options [Line Items]
Research and development expenses	$ 65,783	$ 38,298	$ 133,688	$ 74,967	$ 39,153	$ 183,420
Selling, general and administrative expenses	2,278,371	128,835	7,978,316	193,709	25,869	2,581,371
Stock-based compensation expense	$ 2,344,154	$ 167,133	$ 8,112,004	$ 268,676	$ 65,022	$ 2,764,791

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of Assumptions Used to Determine Fair Value of Options Granted - $ / shares		6 Months Ended		7 Months Ended
	Jan. 02, 2019	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of Assumptions Used to Determine Fair Value of Options Granted [Line Items]
Expected term (in years)	8 years			7 years
Risk-free interest rate	2.59%			1.81%
Expected volatility	27.72%			32.97%
Dividend yield	0.00%		0.00%	0.00%
Fair value on grant date (in Dollars per share)
Minimum [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of Assumptions Used to Determine Fair Value of Options Granted [Line Items]
Expected term (in years)			5 years 1 month 13 days
Risk-free interest rate			0.34%
Expected volatility			34.00%
Fair value on grant date (in Dollars per share)			$ 0.08
Maximum [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of Assumptions Used to Determine Fair Value of Options Granted [Line Items]
Expected term (in years)			6 years 25 days
Risk-free interest rate			1.35%
Expected volatility			45.68%
Fair value on grant date (in Dollars per share)			$ 0.22

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of restricted stock awards - $ / shares	1 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended
	Nov. 01, 2018	Jun. 30, 2021	Dec. 31, 2019	Dec. 31, 2020	May 27, 2019
Schedule of restricted stock awards [Abstract]
Restricted Shares, Balance beginning		177,084	1,625,000	837,500
Weighted Average Grant Date Fair Value Per Share, Balance beginning		$ 0.01	$ 0.01	$ 0.01	$ 0.01
Weighted Average Remaining Vesting Period (in years), Balance beginning		8 months 12 days	2 years 6 months 25 days
Weighted Average Remaining Vesting Period (in years), Balance ending		114,584	837,500	177,084
Weighted Average Grant Date Fair Value Per Share, Balance ending		$ 0.01	$ 0.01	$ 0.01	$ 0.01
Weighted Average Remaining Vesting Period (in years), Balance ending		10 months 2 days	1 year 10 months 28 days	8 months 12 days
Restricted Shares, Vested	(40,000,000)	(62,500)	(787,500)	(660,416)
Weighted Average Grant Date Fair Value Per Share, Vested		$ 0.01	$ 0.01	$ 0.01

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of stock-based compensation expense related to options - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Schedule of stock-based compensation expense related to options [Abstract]
Research and development expenses	$ 104	$ 763	$ 417	$ 2,499	$ 0.35	$ 4.53
Selling, general and administrative expenses		102		335
Share-Based compensation expense	$ 104	$ 865	$ 417	$ 2,834

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of computation of basic and diluted net income (loss) per share - USD ($)	3 Months Ended		6 Months Ended		7 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Schedule of computation of basic and diluted net income (loss) per share [Abstract]
Net income (loss) (in Dollars)	$ 64,327,154	$ (9,152,223)	$ 128,997,958	$ (15,406,868)	$ (15,754,428)	$ (307,027,145)	$ (15,754,427)
Less:
Decrease in fair value of SAFE notes (in Dollars)	(100,802,979)		(182,366,571)
Decrease in fair value of warrants and warrant amortization (in Dollars)	(4,447,683)		(12,528,951)
Undistributed loss allocated to common stockholders for diluted net loss per share (in Dollars)	$ (40,923,508)	$ (9,152,223)	$ (65,897,564)	$ (15,406,868)
Denominator for basic net income (loss) per share – weighted average shares outstanding	71,901,904	86,222,804	80,593,815	90,717,435
Dilutive preferred shares outstanding	131,116,643		131,116,643
Dilutive options and unvested stock units outstanding	20,634,514		20,813,808
Dilutive warrants outstanding	2,514,905		2,533,015
Dilutive SAFE notes outstanding (shares not reserved)	50,526,529		50,526,529
Denominator for diluted net income (loss) per share – adjusted weighted average shares outstanding	276,694,495	86,222,804	285,583,810	90,717,435
Net loss per share – diluted (in Dollars per share)	$ (0.15)	$ (0.11)	$ (0.23)	$ (0.17)

Commitments and Contingencies (Details) - USD ($)		1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
Commitments and Contingencies (Details) - USD ($)	Jul. 13, 2021	Jun. 29, 2021	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Commitments and Contingencies (Details) [Line Items]
Settlement amount				$ 7,000,000.0
Incurred legal expenses			$ 3,500,000	7,400,000
SRAC Indemnity losses		$ 10,000,000
Initial liability			$ 22,000,001	22,000,001
Stable Road Acquisition Corp [Member]
Commitments and Contingencies (Details) [Line Items]
Underwriting discount				$ 3,450,000	$ 3,450,000
Underwriting discount per unit					$ 0.20
Deferred fee (in Dollars per share)			$ 0.40	$ 0.40	$ 0.40
Aggregate amount				$ 6,900,000	$ 6,900,000
Registration rights, description				Cantor may not exercise its demand and “piggyback” registration rights after five (5) and seven (7) years after the effective date of the registration statement and may not exercise its demand rights on more than one occasion. The Company will bear the expenses incurred in connection with the filing of any such registration statements.	Cantor may not exercise its demand and “piggyback” registration rights after five (5) and seven (7) years after the effective date of the registration statement and may not exercise its demand rights on more than one occasion. The Company will bear the expenses incurred in connection with the filing of any such registration statements.
Settlement amount	$ 1,000,000
Underwriting discount per unit (in Dollars per share)				$ 0.20

Income Taxes (Details) - USD ($)	6 Months Ended		7 Months Ended	12 Months Ended
Income Taxes (Details) - USD ($)	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020
Income Taxes (Details) [Line Items]
Effective tax rate	0.00%	0.00%
Federal statutory rate	21.00%
Valuation allowance				$ 17,868,548
Net operating loss carryforwards				24,805,990
Research and development credit carryforwards				1,782,671
Deferred tax asset gross				15,272,584
Deferred tax assets				91,271
Deferred tax liability				$ 88,439
Stable Road Acquisition Corp [Member]
Income Taxes (Details) [Line Items]
Federal statutory rate			21.00%	21.00%
Valuation allowance			$ 24,483	$ 739,394
Deferred tax asset gross			$ 24,483	763,877
Federal [Member]
Income Taxes (Details) [Line Items]
Net operating loss carryforwards				33,710,843
California [Member]
Income Taxes (Details) [Line Items]
Research and development credit carryforwards				$ 1,693,613

Related Party Transactions (Details) - USD ($)				1 Months Ended			3 Months Ended	6 Months Ended		7 Months Ended	12 Months Ended
Related Party Transactions (Details) - USD ($)	Jul. 13, 2021	Jun. 25, 2021	Nov. 08, 2019	Jun. 30, 2019	Jun. 30, 2019	Jun. 28, 2019	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020	Feb. 12, 2021	Mar. 31, 2020	Nov. 13, 2019	Sep. 08, 2019
Related Party Transactions (Details) [Line Items]
Payments of entity total							$ 101,910		$ 393,260
Payments made to entity											$ 502,117
Related party common shares description											In March 2020, a related entity of a co-founder of the Company contributed 10,000,000 shares of Class B Common Stock back to the Company. In conjunction with the contribution, the Company agreed that if it re-hires the co-founder within a specified time period, that co-founder will receive an option to purchase 5,000,000 shares (on a pre-Business Combination basis), subject to the approval of the Board.
Common stock for an aggregate price											$ 75,000,000
Stable Road Acquisition Corp [Member]
Related Party Transactions (Details) [Line Items]
Relinquish of founder shares by sponsor (in Shares)	250,000
Expenses related to public offering				$ 300,000		$ 300,000
Related party borrowings outstanding				$ 222,725	$ 222,725									$ 222,725
Promissory notes												$ 300,000
Aggregate balance												$ 600,000
Additional non intesest bearing promissory notes		$ 21,500
Aggregate balance		$ 43,000						$ 643,500
Working capital loans								$ 1,500,000			1,500,000
Office space per month			$ 10,000
Accrued administrative fees											30,000
Administrative fees										$ 20,000	120,000
Services fees										20,000	$ 30,000
Stable Road Acquisition Corp [Member] \| Business Acquisition [Member]
Related Party Transactions (Details) [Line Items]
Business combination price per share (in Dollars per share)								$ 10.00			$ 10.00				$ 10,000
Stable Road Acquisition Corp [Member] \| Founder Shares [Member]
Related Party Transactions (Details) [Line Items]
Founder shares subject to forfeiture (in Shares)								562,500
Issued and outstanding shares of public offering, percentage								20.00%
Initial business combination, description								The Sponsor has agreed, subject to limited exceptions, not to transfer, assign or sell any of its Founder Shares until the earlier to occur of: (A) one year after the completion of a Business Combination or (B) subsequent to a Business Combination, (x) if the last sale price of the Class A common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after a Business Combination, or (y) the date on which the Company completes a liquidation, merger, capital stock exchange or other similar transaction that results in all of the Company’s stockholders having the right to exchange their shares of common stock for cash, securities or other property.
Brainyspace LLC [Member]
Related Party Transactions (Details) [Line Items]
Shares purchased (in Shares)													5,000,000
Founder Shares [Member] \| Stable Road Acquisition Corp [Member]
Related Party Transactions (Details) [Line Items]
Founder shares subject to forfeiture (in Shares)											562,500
Issued and outstanding shares of public offering, percentage											20.00%
Initial business combination, description											The Sponsor has agreed, subject to limited exceptions, not to transfer, assign or sell any of its Founder Shares until the earlier to occur of: (A) one year after the completion of a Business Combination or (B) subsequent to a Business Combination, (x) if the last sale price of the Class A common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after a Business Combination, or (y) the date on which the Company completes a liquidation, merger, capital stock exchange or other similar transaction that results in all of the Company’s stockholders having the right to exchange their shares of common stock for cash, securities or other property.
Over-Allotment Option [Member] \| Stable Road Acquisition Corp [Member] \| Founder Shares [Member]
Related Party Transactions (Details) [Line Items]
Founder shares subject to forfeiture (in Shares)								562,500
Over-Allotment Option [Member] \| Founder Shares [Member] \| Stable Road Acquisition Corp [Member]
Related Party Transactions (Details) [Line Items]
Founder shares subject to forfeiture (in Shares)											562,500
Chief Executive Officer [Member]
Related Party Transactions (Details) [Line Items]
Consulting fees										187,500
Chief Technology Officer [Member]
Related Party Transactions (Details) [Line Items]
Intellectual property										$ 180,000
Class B Common Stock [Member] \| Stable Road Acquisition Corp [Member]
Related Party Transactions (Details) [Line Items]
Shares issued (in Shares)								4,312,500		4,312,500	4,312,500
Class B Common Stock [Member] \| Stable Road Acquisition Corp [Member] \| Founder Shares [Member]
Related Party Transactions (Details) [Line Items]
Purchase of shares (in Shares)					4,312,500
Common stock for an aggregate price					$ 25,000
Class B Common Stock [Member] \| Brainyspace LLC [Member]
Related Party Transactions (Details) [Line Items]
Shares issued (in Shares)													10,000,000
Class B Common Stock [Member] \| Founder Shares [Member] \| Stable Road Acquisition Corp [Member]
Related Party Transactions (Details) [Line Items]
Purchase of shares (in Shares)					4,312,500
Common stock for an aggregate price					$ 25,000

Subsequent Events (Details) - Subsequent Event [Member] - USD ($) $ in Thousands	5 Months Ended	6 Months Ended
	Jun. 13, 2021	Jul. 13, 2021
Subsequent Events (Details) [Line Items]
Civil penalty,description		In the settlement with the SEC, Momentus will pay a civil penalty of $7.0 million, SRAC will pay a civil penalty of $1.0 million, and Mr. Kabot will pay a civil penalty of $40,000. In addition, the Sponsor has agreed to forfeit 250,000 founders’ shares it would otherwise have received upon consummation of the Business Combination; and Momentus has agreed to undertakings requiring enhancements to its disclosure controls, including the creation of an independent board committee and retention of an internal compliance consultant for a period of two years.
Aggregate investment,		$15.0
Business combination stockholder vote, description	Approximately 3.5 million shares were submitted for redemption, resulting in approximately $35.4 million of returned funds and net cash proceeds of $247.3 million.As the cash proceeds from the Business Combination were at least $100,000,000 but less than $250,000,000, the Combined Company is required to pay, out of funds legally available therefor, an aggregate of $40 million to the Co-Founders, within 10 days following the completion of the Business Combination, as described
Commitments [Member]
Subsequent Events (Details) [Line Items]
New commitments		$ 47,750
Subscription Arrangement [Member]
Subsequent Events (Details) [Line Items]
Subscription agreements		118,000
Remaining PIPE investors.		$ 5,300

Summary of Significant Accounting Policies (Details) - Schedule of fair value of the company’s financial instruments - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Financial Assets:
SAFE notes	$ 162,925,780	$ 314,439,663	$ 2,500,000
Total		317,645,848	2,500,000
Level 3 [Member]
Financial Assets:
SAFE notes		314,439,663	2,500,000
Warrant liability		$ 3,206,185

Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series Seed preferred stock	$ 28	$ 42	$ 42
Series A preferred stock	62	62	62
Total	222,473,383	196,804,208	191,270,364
Series Seed preferred stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series Seed preferred stock	42,298,151	42,298,151	42,298,151
Series Seed-1 preferred stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series Seed-1 preferred stock	3,563,412	3,563,412	3,563,412
Series Seed-2 preferred stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series Seed-2 preferred stock	4,751,218	4,751,218	4,751,218
Series A preferred stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series A preferred stock	61,962,132	61,962,132	61,962,132
Series A-1 preferred stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Series A-1 preferred stock		32,301,028	32,301,028
FF preferred common stock [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
FF preferred common stock		20,000,000	20,000,000
Options outstanding under stock incentive plan [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Options outstanding under stock incentive plan	35,538,222	29,358,286	24,598,969
Options outstanding outside of stock incentive plan [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Options outstanding outside of stock incentive plan	545,454	545,454	545,454
Common stock warrants [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Common stock warrants	1,250,000	1,250,000	1,250,000
Preferred stock warrants [Member]
Summary of Significant Accounting Policies (Details) - Schedule of diluted loss per share [Line Items]
Preferred stock warrants	$ 774,527	$ 774,527

Prepaids and Other Current Assets (Details) - Schedule of prepaids and other current assets - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of prepaids and other current assets [Abstract]
Prepaid launch costs-current	$ 800,000	$ 2,260,000	$ 1,603,500
Prepaid research and development	$ 3,819,756	1,452,557	109,264
Prepaid insurance and other assets		795,727	512,450
Total		$ 4,508,284	$ 2,225,214

Property, Machinery and Equipment, net (Details) - Schedule of property, machinery and equipment, net - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of property, machinery and equipment, net [Abstract]
Computer equipment	$ 177,868	$ 177,868	$ 109,586
Furniture and fixtures	205,976	205,976	131,891
Leasehold improvements	897,529	665,146	461,280
Machinery and equipment	2,800,170	1,935,974	1,079,184
Construction in-progress	1,913,308	117,655	229,983
Total assets	5,994,851	3,102,619	2,011,924
Less: accumulated depreciation	(1,207,172)	(781,519)	(224,842)
Property, machinery and equipment, net	$ 4,787,679	$ 2,321,100	$ 1,787,082

Intangible assets, net (Details) - Schedule of Intangible assets, net - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Schedule of Intangible assets, net [Abstract]
Gross Value, Patents/Intellectual Property	$ 356,890	$ 235,925
Accumulated Amortization, Patents/Intellectual Property	(51,408)	(18,014)
Net Value, Patents/Intellectual Property	$ 305,482	$ 217,911
Weighted average remaining amortization period (in years), Patents/Intellectual Property	7 years 7 months 13 days	8 years 11 months 19 days

Intangible assets, net (Details) - Schedule of amortization expense related to intangible assets - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Schedule of amortization expense related to intangible assets [Abstract]
2021	$ 23,602	$ 40,062
2022	47,204	40,062
2023	47,204	40,062
2024	41,444	40,062
2025	38,487	40,062
Thereafter	123,654	105,172
Total	$ 321,595	$ 305,482

Leases (Details) - Schedule of the company performed evaluations of its contracts and determined that each of its identified leases - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Schedule of the company performed evaluations of its contracts and determined that each of its identified leases [Abstract]
Operating lease cost	$ 435,487	$ 67,896	$ 870,975	$ 135,791	$ 271,582
Variable lease expense	147,412	6,508	294,825	12,215	24,430
Short-term lease expense	2,965	1,847	6,236	2,380	9,060
Total lease expense	$ 585,864	$ 76,251	$ 1,172,036	$ 150,386	$ 305,072

Leases (Details) - Schedule of the lease right of use assets and lease liabilities recognized in the balance sheets - USD ($)	12 Months Ended
	Dec. 31, 2020	Jun. 30, 2021
Schedule of the lease right of use assets and lease liabilities recognized in the balance sheets [Abstract]
Right of use asset in other non-current assets	$ 316,040
Other current liabilities	254,197	$ 1,009,827
Other non-current liabilities	71,961	7,767,283
Total lease liability	$ 326,158	$ 8,777,110

Leases (Details) - Schedule of the maturities of the company’s operating lease liabilities - USD ($)	Jun. 30, 2021	Dec. 31, 2020	Jan. 01, 2020
Schedule of the maturities of the company’s operating lease liabilities [Abstract]
2021	$ 622,375	$ 279,793
2022	1,561,154	67,045
Total lease payments	10,624,071	346,838
Less: Imputed interest	(1,846,961)	(20,680)
Present value of lease liabilities	8,777,110	326,158	$ 555,916
2023 and thereafter	$ 3,700,071
Total		$ 346,838

Accrued Expenses (Details) - Schedule of accrued expenses - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Schedule of accrued expenses [Abstract]
Compensation expense	$ 1,326,311	$ 517,290
Other current expense	904,052	156,842
Offering costs	505,783
Payroll tax expense	327,734	37,332
Total	$ 3,063,880	$ 711,464

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of preferred stock shares designated, issued, and outstanding	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Series Seed Preferred [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of preferred stock shares designated, issued, and outstanding [Line Items]
Shares Designated \| shares	44,745,720
Shares Issued and Outstanding \| shares	42,298,151
Liquidation Price \| $ / shares	$ 0.21392
Dividend Rate \| $ / shares	$ 0.01284
Series Seed-1 Preferred [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of preferred stock shares designated, issued, and outstanding [Line Items]
Shares Designated \| shares	3,563,412
Shares Issued and Outstanding \| shares	3,563,412
Liquidation Price \| $ / shares	$ 0.14031
Dividend Rate \| $ / shares	$ 0.00842
Series Seed-2 Preferred [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of preferred stock shares designated, issued, and outstanding [Line Items]
Shares Designated \| shares	4,751,218
Shares Issued and Outstanding \| shares	4,751,218
Liquidation Price \| $ / shares	$ 0.10524
Dividend Rate \| $ / shares	$ 0.00631
Series A Preferred [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of preferred stock shares designated, issued, and outstanding [Line Items]
Shares Designated \| shares	65,000,000
Shares Issued and Outstanding \| shares	61,962,132
Liquidation Price \| $ / shares	$ 0.29050
Dividend Rate \| $ / shares	$ 0.01743
Series A-1 Preferred [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of preferred stock shares designated, issued, and outstanding [Line Items]
Shares Designated \| shares	32,301,028
Shares Issued and Outstanding \| shares	32,301,028
Liquidation Price \| $ / shares	$ 0.23240
Dividend Rate \| $ / shares	$ 0.01394

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes - shares	Jun. 30, 2021	Dec. 31, 2020
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total	177,853,818	281,048,112
Series Seed preferred stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total	28,538,853	42,298,151
Series Seed-1 preferred stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total	3,563,412	3,563,412
Series Seed-2 preferred stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total	4,751,218	4,751,218
Series A preferred stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total	61,962,132	61,962,132
Series A-1 preferred stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total		32,301,028
FF preferred common stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total		20,000,000
Class B common stock [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total		70,000,000
Options outstanding under stock incentive plan [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total	21,060,965	29,358,286
Options outstanding outside of stock incentive plan [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total	545,454	545,454
Option available for grant under stock incentive plan [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total	21,284,453	14,243,904
Common stock warrants [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total	1,250,000	1,250,000
Preferred stock warrants [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of reserved shares of Class A common stock for issuance for the following purposes [Line Items]
Total	2,596,303	774,527

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of fair value of the warrant was estimated using the black-scholes-merton option pricing model		6 Months Ended		7 Months Ended
	Jan. 02, 2019	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019
Schedule of fair value of the warrant was estimated using the black-scholes-merton option pricing model [Abstract]
Expected term (in years)	8 years			7 years
Risk-free interest rate	2.59%			1.81%
Expected volatility	27.72%			32.97%
Dividend yield	0.00%		0.00%	0.00%

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of fair value of the warrant was estimated using the black-scholes-merton option pricing model - Option Outside of Stock Plan [Member]	7 Months Ended
	Dec. 31, 2019
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of fair value of the warrant was estimated using the black-scholes-merton option pricing model [Line Items]
Expected term (in years)	5 years
Risk-free interest rate	1.62%
Expected volatility	35.30%
Dividend yield	0.00%

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of options activity - Options and RSAs Under Stock Plans [Member] - USD ($)	7 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of options activity [Line Items]
Shares Available for Option Grants Under Plan, Outstanding beginning balance	19,325,958	8,657,568
Options Outstanding Under Plan, Outstanding beginning balance	9,500,000	24,598,969
Non-Plan Options, Outstanding beginning balance		545,454
Total Options, Outstanding ending balance	9,500,000	25,144,423
Weighted- Average Exercise Price Per Share, Vested exercised, beginning balance (in Dollars per share)		$ 0.04
Weighted- Average Remaining Contractual Term (in years), beginning balance	9 years 4 months 28 days
Aggregate Intrinsic Value, Exercisable, beginning balance (in Dollars)	$ 375,000
Shares Available for Option Grants Under Plan, Authorized for issuance	4,430,579	13,250,000
Options Outstanding Under Plan, Authorized for issuance
Non-Plan Options, Authorized for issuance
Total Options, Authorized for issuance
Weighted- Average Exercise Price Per Share, Authorized for issuance (in Dollars per share)
Shares Available for Option Grants Under Plan, Granted	(15,098,969)	(15,137,861)
Options Outstanding Under Plan, Granted	15,098,969	15,137,861
Non-Plan Options, Granted	545,454
Total Options, Granted	15,644,423	15,137,861
Weighted- Average Exercise Price Per Share, Granted (in Dollars per share)	$ 0.06	$ 0.07
Shares Available for Option Grants Under Plan, Vested exercised,
Options Outstanding Under Plan, Vested exercised		(2,904,347)
Non-Plan Options, Vested exercised
Total Options, Vested exercised		(2,904,347)
Weighted- Average Exercise Price Per Share, Vested exercised (in Dollars per share)		$ 0.03
Shares Available for Option Grants Under Plan, Forfeitures		7,474,197
Options Outstanding Under Plan, Forfeitures		(7,474,197)
Non-Plan Options, Forfeitures
Total Options, Forfeitures		(7,474,197)
Weighted- Average Exercise Price Per Share, Forfeitures (in Dollars per share)		$ 0.06
Shares Available for Option Grants Under Plan, ending balance	8,657,568	14,243,904
Options Outstanding Under Plan, ending balance	24,598,969	29,358,286
Non-Plan Options, Outstanding ending balance	545,454	545,454
Total Options, Outstanding ending balance	25,144,423	29,903,740
Weighted- Average Exercise Price Per Share, ending balance (in Dollars per share)	$ 0.04	$ 0.05
Weighted- Average Remaining Contractual Term (in years), ending balance	9 years 1 month 13 days	8 years 5 months 26 days
Aggregate Intrinsic Value, ending balance (in Dollars)	$ 681,779	$ 130,563,848
Total Options, Exercisable		12,697,969
Weighted- Average Exercise Price Per Share, Exercisable (in Dollars per share)		$ 0.04
Weighted- Average Remaining Contractual Term (in years), Exercisable		8 years 1 month 2 days
Aggregate Intrinsic Value, Exercisable (in Dollars)		$ 55,573,549
Total Options, Vested and expected to vest		29,903,740
Weighted- Average Exercise Price Per Share, Vested and expected to vest		0.05
Weighted- Average Remaining Contractual Term (in years), Vested and expected to vest		8 years 5 months 26 days
Aggregate Intrinsic Value, Vested and expected to vest (in Dollars)		$ 130,563,848

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of stock-based compensation expense related to options - Options and RSAs Under Stock Plans [Member] - USD ($)	3 Months Ended		6 Months Ended		7 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of stock-based compensation expense related to options [Line Items]
Research and development expenses	$ 65,783	$ 38,298	$ 133,688	$ 74,967	$ 39,153	$ 183,420
Selling, general and administrative expenses	2,278,371	128,835	7,978,316	193,709	25,869	2,581,371
Stock-based compensation expense	$ 2,344,154	$ 167,133	$ 8,112,004	$ 268,676	$ 65,022	$ 2,764,791

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of black-scholes-merton option-pricing model and weighted average fair value of options on the grant - Options and RSAs Under Stock Plans [Member] - $ / shares	7 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of black-scholes-merton option-pricing model and weighted average fair value of options on the grant [Line Items]
Dividend yield	0.00%	0.00%
Fair value on grant date (in Dollars per share)	$ 0.02
Minimum [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of black-scholes-merton option-pricing model and weighted average fair value of options on the grant [Line Items]
Expected term (in years)	5 years 10 months 6 days	5 years 10 days
Risk-free interest rate	2.45%	0.27%
Expected volatility	31.20%	34.00%
Fair value on grant date (in Dollars per share)		$ 0.08
Maximum [Member]
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of black-scholes-merton option-pricing model and weighted average fair value of options on the grant [Line Items]
Expected term (in years)	6 years 29 days	6 years 2 months 23 days
Risk-free interest rate	2.54%	1.36%
Expected volatility	31.53%	51.78%
Fair value on grant date (in Dollars per share)		$ 1.16

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of restricted stock awards - $ / shares	1 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended
	Nov. 01, 2018	Jun. 30, 2021	Dec. 31, 2019	Dec. 31, 2020
Schedule of restricted stock awards [Abstract]
Restricted Shares, Balance beginning		177,084	1,625,000	837,500
Weighted Average Grant Date Fair Value Per Share, Balance beginning		$ 0.01	$ 0.01	$ 0.01
Weighted Average Remaining Vesting Period (in years), Balance beginning		8 months 12 days	2 years 6 months 25 days
Weighted Average Remaining Vesting Period (in years), Balance ending		114,584	837,500	177,084
Weighted Average Remaining Vesting Period (in years), Balance ending		$ 0.01	$ 0.01	$ 0.01
Weighted Average Remaining Vesting Period (in years), Balance ending		10 months 2 days	1 year 10 months 28 days	8 months 12 days
Restricted Shares, Vested	(40,000,000)	(62,500)	(787,500)	(660,416)
Weighted Average Grant Date Fair Value Per Share, Vested		$ 0.01	$ 0.01	$ 0.01

Stockholders' Equity and Stock-based Compensation (Details) - Schedule of stock-based compensation expense related to options - Restricted Stock Awards [Member] - USD ($)	7 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020
Stockholders' Equity and Stock-based Compensation (Details) - Schedule of stock-based compensation expense related to options [Line Items]
Research and development expenses	$ 5,373	$ 4,099
Selling, general and administrative expenses	2,491	2,273
Stock-based compensation expense	$ 7,864	$ 6,372

Income Taxes (Details) - Schedule of accounts for income taxes requires the use of asset and liability method - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Schedule of accounts for income taxes requires the use of asset and liability method [Abstract]
US	$ (307,027,145)	$ (15,754,427)
Total	$ (307,027,145)	$ (15,754,427)

Income Taxes (Details) - Schedule of net income tax provision - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current:
State	$ 800	$ 800
Income tax provision	$ 800	$ 800

Income Taxes (Details) - Schedule of reconciliation of federal income tax rate and effective tax rate - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Schedule of reconciliation of federal income tax rate and effective tax rate [Abstract]
Statutory tax rate					21.00%	21.00%
State taxes, net of federal benefit					$ 1.03	$ 8.44
Research and development credits	$ 104	$ 763	$ 417	$ 2,499	0.35	4.53
Non-deductible expenses					(18.43)	(1.92)
Valuation allowance					(3.86)	(30.92)
Uncertain tax positions					(0.09)
Other						$ (1.13)
Effective tax rate					0.00%	0.00%

Income Taxes (Details) - Schedule of deferred income taxes - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Start-up and organization costs	$ 4,280,464	$ 1,624,196
Accrued expenses and reserves	503,840
Stock-based compensation	170,770	5,072
Tax credit carryforwards	2,340,468	937,893
Net operating loss	8,811,628	3,178,391
Property and equipment	288,656	132,878
Intangible assets	14,386	5,041
Capitalized R&D costs	566,973
Operating lease obligations	91,271
Warrants	888,975
Other		142,012
Total deferred tax assets before valuation allowance	17,957,431	6,025,483
Valuation allowance	(17,868,548)	(6,025,483)
Total deferred tax assets	88,883
Deferred tax liabilities:
Operating lease right-of-use assets	(88,439)
Other	(444)
Total deferred tax liabilities	(88,883)
Net deferred tax assets

Income Taxes (Details) - Schedule of gross unrecognized tax benefits	12 Months Ended
	Dec. 31, 2020 USD ($)
Schedule of gross unrecognized tax benefits [Abstract]
Balance at December 31, 2019	$ 312,631
Increases related to prior tax positions
Increases related to current tax positions	467,526
Balance at December 31, 2020	$ 780,157

Subsequent Events (Details) - USD ($)			1 Months Ended	6 Months Ended	12 Months Ended
Subsequent Events (Details) - USD ($)	Feb. 28, 2028	Jul. 13, 2021	Feb. 22, 2021	Jun. 30, 2021	Dec. 31, 2020	Feb. 28, 2021
Subsequent Events (Details) [Line Items]
Initial growth capital term loan			$ 25,000,000
Additional growth capital term loan			$ 15,000,000
Minimum additional equity				$ 25,000,000
Subsequent Event [Member]
Subsequent Events (Details) [Line Items]
Over term lease	$ 11,000,000
Annual interest rate				12.00%
Subsequent event, Description				In conjunction with the LSA, the lender will receive warrants for preferred stock equal to up to 1% of the Company’s fully diluted capitalization (including allowance for conversion of all outstanding convertible notes, SAFE notes and such warrants). The warrants are earned and vest 80% upon signing of the agreement, 10% upon qualification for the incremental $15,000,000 growth capital term loan and 10% upon the Company’s utilizing such incremental growth capital term loan. The exercise price of the warrants is an aggregate of $1,000.
Stable Road Acquisition Corp [Member]
Subsequent Events (Details) [Line Items]
Working capital cost						$ 300,000
Civil penalty					$ 1,000,000.0
Relinquish of founder shares (in Shares)		250,000
Accounts payable				$ 1,000,000.0
Stable Road Acquisition Corp [Member] \| Subsequent Event [Member]
Subsequent Events (Details) [Line Items]
Civil penalty		$ 1,000,000.0
Relinquish of founder shares (in Shares)		250,000
Internal compliance consultant period		2 years
Stable Road Acquisition Corp [Member] \| Momentus [Member]
Subsequent Events (Details) [Line Items]
Civil penalty					7,000,000.0
Stable Road Acquisition Corp [Member] \| Momentus [Member] \| Subsequent Event [Member]
Subsequent Events (Details) [Line Items]
Civil penalty		$ 7,000,000.0
Stable Road Acquisition Corp [Member] \| Mr.Kabot [Member]
Subsequent Events (Details) [Line Items]
Civil penalty					$ 40,000
Stable Road Acquisition Corp [Member] \| Mr.Kabot [Member] \| Subsequent Event [Member]
Subsequent Events (Details) [Line Items]
Civil penalty		$ 40,000

Description of Organization and Business Operations (Details) - Stable Road Acquisition Corp [Member] - USD ($)			6 Months Ended	12 Months Ended
	Oct. 07, 2020	Nov. 13, 2019	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Description of Organization and Business Operations (Details) [Line Items]
Underwriting fees			$ 3,450,000
Deferred underwriting fees			6,900,000	$ 6,900,000
Offering costs			$ 574,857	$ 574,857
Net offering proceeds		$ 172,500,000
Share price unit (in Dollars per share)		$ 10.00	$ 10.00	$ 10.00
Percentage of assets held in trust account				80.00%
Dissolution expenses			$ 100,000	$ 100,000
AggregateOfPublicSharesPercentage			15.00%	15.00%
Obligation to redeem public			100.00%	100.00%
Interest expense			$ 100,000
Initial public offering (in Dollars per share)			$ (10.00)	$ (10.00)
Description of merger agreement			the Merger Agreement, the aggregate merger consideration payable to the equityholders of Momentus will be paid in equity consideration equal to $566,600,000, minus Momentus’ indebtedness for borrowed money as of the closing of the Mergers (the “Closing”), plus the amount of Momentus’ cash and cash equivalents (excluding restricted cash as determined in accordance with GAAP, any cash being held on behalf of Momentus’ customers and any security deposits for leases) as of the Closing, plus the aggregate exercise price of all outstanding options and warrants (the “Merger Consideration”). The Merger Consideration payable to the stockholders of Momentus will be paid in shares of newly issued Class A common stock of SRAC, with a deemed value of $10 per share.	the Merger Agreement, the aggregate merger consideration payable to the equityholders of Momentus will be paid in equity consideration equal to $1,131,000,000, minus Momentus’ indebtedness for borrowed money as of the closing of the Mergers (the “Closing”), plus the amount of Momentus’ cash and cash equivalents (excluding restricted cash as determined in accordance with GAAP, any cash being held on behalf of Momentus’ customers and any security deposits for leases) as of the Closing, plus the aggregate exercise price of all outstanding options and warrants (the “Merger Consideration”). The Merger Consideration payable to the stockholders of Momentus will be paid in shares of newly issued Class A common stock of SRAC, with a deemed value of $10 per share.
Purchase price per share (in Dollars per share)			$ 10.00
Transaction costs				$ 10,924,857
Underwriting fees				$ 3,450,000
Merger Agreement [Member]
Description of Organization and Business Operations (Details) [Line Items]
Repurchase agreement description				the Company and Momentus entered into a repurchase agreement (the “Repurchase Agreement”) pursuant to which, among other things, the Company has agreed to repurchase a certain number of shares of Class A common stock from an investor in Momentus, at a purchase price of $10.00 per share, immediately following the Closing (the “Repurchase”). The Repurchase is contingent on the amount of available cash the Company has at the Closing from (a) the Private Placement (and any alternative financing arranged by the Company and Momentus in the event the Private Placement becomes unavailable) and (b) the funds in the Company’s trust account (after taking into account payments required to satisfy SRAC’s stockholder redemptions), after further deducting the amount of the Company’s transaction expenses and Momentus’ transaction expenses (“Net Proceeds”) being in excess of $265 million. If Net Proceeds exceed $265,000,000 but are less than $280,000,000, the number of shares of Class A common stock subject to the Repurchase will be equal to the amount by which Net Proceeds exceed $250 million, divided by $10.00. In the event Net Proceeds are in excess of $280,000,000, the number of shares of Class A common stock subject to the Repurchase will be equal to $30,000,000, divided by $10.00. At the closing of the Repurchase, the Company will be entitled to deduct from such cash payment an amount equal to 3.3% of such cash payment (representing PML’s obligation to pay Momentus a portion of its transaction expenses).
Investors [Member]
Description of Organization and Business Operations (Details) [Line Items]
Price per warrant (in Dollars per share)			$ 11.50
Series of Individually Immaterial Business Acquisitions [Member]
Description of Organization and Business Operations (Details) [Line Items]
Transaction costs			$ 10,924,857
Percentage of assets held in trust account			80.00%
Business combination of voting interest, percentage			50.00%	50.00%
Net tangible assets of business combination			$ 5,000,001	$ 5,000,001
IPO [Member]
Description of Organization and Business Operations (Details) [Line Items]
(in Shares)		17,250,000
Gross proceeds		$ 172,500,000
Net offering proceeds		$ 172,500,000
Initial public offering (in Dollars per share)		$ 17,250,000
Description of business combination agreement			(i) $10.00 per Public Share and (ii) the actual amount per Public Share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per share due to reductions in the value of the trust assets less taxes payable. This liability will not apply with respect to any claims by a third party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) or to any claims under the Company’s indemnity of the underwriter of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). The Company will seek to reduce the possibility that the Sponsor will have to indemnify the Trust Account due to claims of creditors by endeavoring to have all vendors, service providers, prospective target businesses or other entities with which the Company does business, execute agreements with the Company waiving any right, title, interest or claim of any kind in or to monies held in the Trust Account. The Company’s independent registered public accounting firm and the underwriter of the Initial Public Offering will not execute agreements with the Company waiving such claims to the monies held in the Trust Account.	(i) $10.00 per Public Share and (ii) the actual amount per Public Share held in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per share due to reductions in the value of the trust assets less taxes payable. This liability will not apply with respect to any claims by a third party or prospective target business who executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is enforceable) or to any claims under the Company’s indemnity of the underwriter of the Initial Public Offering against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). The Company will seek to reduce the possibility that the Sponsor will have to indemnify the Trust Account due to claims of creditors by endeavoring to have all vendors, service providers, prospective target businesses or other entities with which the Company does business, execute agreements with the Company waiving any right, title, interest or claim of any kind in or to monies held in the Trust Account. The Company’s independent registered public accounting firm and the underwriter of the Initial Public Offering will not execute agreements with the Company waiving such claims to the monies held in the Trust Account.
Common stock shares purchased (in Shares)			19,662
Description of outstanding voting securities				The Company will only complete a Business Combination if the post-transaction company owns or acquires 50% or more of the outstanding voting securities of the target or otherwise acquires a controlling interest in the target sufficient for it not to be required to register as an investment company under the Investment Company Act.
Over-Allotment Option [Member]
Description of Organization and Business Operations (Details) [Line Items]
(in Shares)		2,250,000
Price per share (in Dollars per share)		$ 10.00
Share price unit (in Dollars per share)		$ 10.00
Purchase an additional units (in Shares)		2,250,000
Private Placement [Member]
Description of Organization and Business Operations (Details) [Line Items]
(in Shares)			545,000
Price per share (in Dollars per share)			$ 10.00
Gross proceeds		$ 5,450,000	$ 5,450,000
Share price unit (in Dollars per share)		$ 10.00
Initial public offering (in Shares)		545,000
Class A Common Stock [Member]
Description of Organization and Business Operations (Details) [Line Items]
Common stock shares purchased (in Shares)			6,379,970	6,668,084	2,369,468
Description of business combination				(a) approval by SRAC’s stockholders and Momentus’ stockholders, (b) SRAC having at least $5,000,001 of net tangible assets as of the effective time of the consummation of the Mergers, and (c) the approval of the listing of the shares of Class A common stock to be issued in connection with the Closing on The Nasdaq Stock Market LLC and the effectiveness of a Registration Statement on Form S-4. The Merger Agreement may be terminated under certain customary and limited circumstances prior to the consummation of the Mergers.
Repurchase agreement description			Each Unit consists of one share of Class A common stock and one-half of one redeemable warrant (“Public Warrant”). Each whole Public Warrant entitles the holder to purchase one share of Class A common stock at a price of $11.50 per share, subject to adjustment (see Note 7).	Each Unit consists of one share of Class A common stock and one-half of one redeemable warrant (“Public Warrant”). Each whole Public Warrant entitles the holder to purchase one share of Class A common stock at a price of $11.50 per share, subject to adjustment (see Note 7).
Class A Common Stock [Member] \| Series of Individually Immaterial Business Acquisitions [Member]
Description of Organization and Business Operations (Details) [Line Items]
Business acquired description			(a) approval by SRAC’s stockholders and Momentus’ stockholders, (b) SRAC having at least $5,000,001 of net tangible assets as of the effective time of the consummation of the Mergers, and (c) the approval of the listing of the shares of Class A common stock to be issued in connection with the Closing on The Nasdaq Stock Market LLC and the effectiveness of a Registration Statement on Form S-4. The Merger Agreement may be terminated under certain customary and limited circumstances prior to the consummation of the Mergers.
Class A Common Stock [Member] \| Private Placement [Member]
Description of Organization and Business Operations (Details) [Line Items]
(in Shares)	11,000,000
Price per share (in Dollars per share)	$ 10.00
Purchase an aggregate of shares (in Shares)	11,000,000
Repurchase agreement description				Each Placement Unit consists of one share of Class A common stock (“Placement Share”) and one-half of one redeemable warrant (“Placement Warrant”). Each whole Placement Warrant is exercisable to purchase one share of Class A common stock at a price of $11.50 per share. The proceeds from the Placement Units were added to the proceeds from the Initial Public Offering held in the Trust Account.

Summary of Significant Accounting Policies (Details) - Schedule of calculation of basic and diluted net income per common share - Stable Road Acquisition Corp [Member] - USD ($)	3 Months Ended		6 Months Ended		7 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020
Numerator: Net Income allocable to Redeemable Class A Common Stock
Interest Income	$ 4,311	$ 355,824	$ 23,357	$ 1,025,613	$ 346,011	$ 1,134,391
Less: Income and Franchise Tax available to be withdrawn from the Trust Account	(4,311)	(355,824)	(23,357)	(1,025,613)
Redeemable Net Income
Net Income/Basic and Diluted Redeemable Class A Common Stock (in Dollars per share)	$ 0.00	$ 0.02	$ 0.00	$ 0.04
Redeemable Class A Common Stock, Basic and Diluted (in Shares)	17,240,709	17,250,000	17,245,329	17,250,000
Numerator: Net Income minus Net Income – Basic
Net Income	$ (2,884,835)	$ 1,222,072	$ 2,881,651	$ 2,431,243
Less: Redeemable Net Income – Basic (in Shares)
Non-Redeemable Net Loss	$ (2,884,835)	$ 1,222,072	$ 2,881,651	$ 2,431,243
Net income, Basic Non-Redeemable Class A and B Common Stock (in Dollars per share)	$ (0.59)	$ 0.19	$ 0.59	$ 0.35
Non-Redeemable Class A and B Common Stock, Basic (in Shares)	4,857,500	4,857,500	4,857,500	4,857,500
Numerator: Net Income minus Net Earnings – Diluted
Non-Redeemable Net Income – Basic	$ (2,884,835)	$ 1,222,072	$ 2,881,651	$ 2,431,243
Less: Change in Fair Value of Derivative Liability (in Shares)	(1,904,150)	(1,185,700)	(10,623,913)	(2,135,400)
Non-Redeemable Net Loss – Diluted	$ (4,788,985)	$ 36,372	$ (7,742,262)	$ 295,843
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Diluted (in Shares)	5,005,558	4,857,500	7,105,104	4,857,500
Net loss, Diluted Non-Redeemable Class A and B Common Stock (in Dollars per share)	$ (0.96)	$ 0.19	$ (1.09)	$ 0.35

Initial Public Offering (Details) - Stable Road Acquisition Corp [Member] - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
IPO [Member]
Initial Public Offering (Details) [Line Items]
Share units	17,250,000	17,250,000
Share units per share	$ 10.00	$ 10.00
Over-Allotment Option [Member]
Initial Public Offering (Details) [Line Items]
Share units	2,250,000	2,250,000
Class A Common Stock [Member]
Initial Public Offering (Details) [Line Items]
Share units per share	$ 11.50	$ 11.50
Description of shares	Each Unit consists of one share of Class A common stock and one-half of one redeemable warrant (“Public Warrant”). Each whole Public Warrant entitles the holder to purchase one share of Class A common stock at a price of $11.50 per share, subject to adjustment (see Note 7).	Each Unit consists of one share of Class A common stock and one-half of one redeemable warrant (“Public Warrant”). Each whole Public Warrant entitles the holder to purchase one share of Class A common stock at a price of $11.50 per share, subject to adjustment (see Note 7).

Private Placement (Details) - Placement Warrant [Member] - Stable Road Acquisition Corp [Member] - USD ($)		6 Months Ended	12 Months Ended
	Oct. 07, 2020	Jun. 30, 2021	Dec. 31, 2020
Private Placement (Details) [Line Items]
Number of placement units		545,000
Sponsor [Member]
Private Placement (Details) [Line Items]
Purchased an aggregate of placement units		545,000
Stock price per share		$ 10.00	$ 10.00
Purchase price		$ 5,450,000	$ 5,450,000
Number of placement units			545,000
Class A Common Stock [Member]
Private Placement (Details) [Line Items]
Placement unit description			Each Placement Unit consists of one share of Class A common stock (“Placement Share”) and one-half of one redeemable warrant (“Placement Warrant”). Each whole Placement Warrant is exercisable to purchase one share of Class A common stock at a price of $11.50 per share. The proceeds from the Placement Units were added to the proceeds from the Initial Public Offering held in the Trust Account.
Number of placement units	11,000,000
Class A Common Stock [Member]
Private Placement (Details) [Line Items]
Placement unit description		Each Placement Unit consists of one share of Class A common stock (“Placement Share”) and one-half of one redeemable warrant (“Placement Warrant”). Each whole Placement Warrant is exercisable to purchase one share of Class A common stock at a price of $11.50 per share. The proceeds from the Placement Units were added to the proceeds from the Initial Public Offering held in the Trust Account.

Warrant Liabilities (Details) - Stable Road Acquisition Corp [Member] - shares	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Warrant Liabilities (Details) [Line Items]
Public warrants	8,625,000
Private placement warrants		272,500
Warrant expire	5 years	5 years
Public warrants, description	• in whole and not in part;• at a price of $0.01 per warrant;• upon not less than 30 days’ prior written notice of redemption; and• if, and only if, the reported last sale price of the Company’s Class A common stock equals or exceeds $18.00 per share for any 20 trading days within a 30-trading day period ending three business days before the Company sends the notice of redemption to the warrant holders.	• in whole and not in part;• at a price of $0.01 per warrant;• upon not less than 30 days’ prior written notice of redemption; and• if, and only if, the reported last sale price of the Company’s Class A common stock equals or exceeds $18.00 per share for any 20 trading days within a 30-trading day period ending three business days before the Company sends the notice of redemption to the warrant holders.
Business Combination [Member]
Warrant Liabilities (Details) [Line Items]
Business combination, description	In addition, if (x) the Company issues additional shares of Class A common stock or equity-linked securities for capital raising purposes in connection with the closing of a Business Combination at an issue price or effective issue price of less than $9.20 per share of Class A common stock (with such issue price or effective issue price to be determined in good faith by the Company’s board of directors and, in the case of any such issuance to the Sponsor or its affiliates, without taking into account any Founder Shares held by the Sponsor or such affiliates, as applicable, prior to such issuance) (the “Newly Issued Price”), and (y) the aggregate gross proceeds from such issuances represent more than 60% of the total equity proceeds, and interest thereon, available for the funding of a Business Combination on the date of the consummation of a Business Combination (net of redemptions), and (z) the volume weighted average trading price of the shares of Class A common stock during the 20 trading day period starting on the trading day prior to the day on which the Company consummates a Business Combination (such price, the “Market Value”) is below $9.20 per share, the exercise price of the warrants will be adjusted (to the nearest cent) to be equal to 115% of the higher of the Market Value and the Newly Issued Price, and the $18.00 per share redemption trigger price will be adjusted (to the nearest cent) to be equal to 180% of the higher of the Market Value and the Newly Issued Price.	In addition, if (x) the Company issues additional shares of Class A common stock or equity-linked securities for capital raising purposes in connection with the closing of a Business Combination at an issue price or effective issue price of less than $9.20 per share of Class A common stock (with such issue price or effective issue price to be determined in good faith by the Company’s board of directors and, in the case of any such issuance to the Sponsor or its affiliates, without taking into account any Founder Shares held by the Sponsor or such affiliates, as applicable, prior to such issuance) (the “Newly Issued Price”), and (y) the aggregate gross proceeds from such issuances represent more than 60% of the total equity proceeds, and interest thereon, available for the funding of a Business Combination on the date of the consummation of a Business Combination (net of redemptions), and (z) the volume weighted average trading price of the shares of Class A common stock during the 20 trading day period starting on the trading day prior to the day on which the Company consummates a Business Combination (such price, the “Market Value”) is below $9.20 per share, the exercise price of the warrants will be adjusted (to the nearest cent) to be equal to 115% of the higher of the Market Value and the Newly Issued Price, and the $18.00 per share redemption trigger price will be adjusted (to the nearest cent) to be equal to 180% of the higher of the Market Value and the Newly Issued Price.
Class A Common Stock [Member]
Warrant Liabilities (Details) [Line Items]
Aggregate shares	12,066,667

Fair Value Measurements (Details) - Stable Road Acquisition Corp [Member] - USD ($)		3 Months Ended		6 Months Ended		7 Months Ended	12 Months Ended
	Nov. 13, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020
Fair Value Measurements (Details) [Line Items]
Assets held in the trust account, cash		$ 1,258		$ 1,258			$ 636
Interest income		184,489	$ 824,873	184,489	$ 824,873		872,653
Assets held in the trust account, cash							636
Assets held in the trust account, cash							873
Total fair value						$ 7,331,250
U.S. Treasury Securities [Member]
Fair Value Measurements (Details) [Line Items]
Assets held in the trust account, cash		$ 172,748,233		$ 172,748,233			173,107,113
Assets held in the trust account, cash							173,107,113
Assets held in the trust account, cash							172,845,138
Private Placement Warrants [Member]
Fair Value Measurements (Details) [Line Items]
Price per warrants (in Dollars per share)	$ 1.67	$ 4.51		$ 4.51
Aggregate value	$ 500,000			$ 1,200,000		526,000	2,500,000
Public Warrants [Member]
Fair Value Measurements (Details) [Line Items]
Price per warrants (in Dollars per share)	$ 1.57	$ 4.20		$ 4.20
Aggregate value	$ 13,500,000			$ 36,200,000		$ 7,300,000	$ 45,600,000

Fair Value Measurements (Details) - Schedule of fair value of held-to-maturity securities - Stable Road Acquisition Corp [Member]	12 Months Ended
	Dec. 31, 2020 USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Held-To-Maturity	U.S.Treasury Securities
Amortized Cost	$ 173,107,113
Gross Holding Gains	1,887
Fair Value	$ 173,109,000

Fair Value Measurements (Details) - Schedule of liabilities that are measured at fair value on a recurring basis - Stable Road Acquisition Corp [Member] - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
U.S. Treasury Securities [Member] \| Level 1 [Member]
Fair Value Measurements (Details) - Schedule of liabilities that are measured at fair value on a recurring basis [Line Items]
Marketable securities held in Trust Account – U.S. Treasury Securities Money Market Fund	$ 172,748,233
Public Warrants [Member] \| Level 1 [Member]
Fair Value Measurements (Details) - Schedule of liabilities that are measured at fair value on a recurring basis [Line Items]
Warrant Liability	36,225,000	$ 45,625,388
Private Placement Warrants [Member] \| Level 3 [Member]
Fair Value Measurements (Details) - Schedule of liabilities that are measured at fair value on a recurring basis [Line Items]
Warrant Liability	$ 1,228,975	$ 2,452,500

Fair Value Measurements (Details) - Schedule of key inputs into the Black-Scholes model for the private placement warrants - Stable Road Acquisition Corp [Member] - $ / shares	6 Months Ended		7 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
Fair Value Measurements (Details) - Schedule of key inputs into the Black-Scholes model for the private placement warrants [Line Items]
Risk-free interest rate	0.89%	1.73%	1.74%	0.31%
Holding period (years)	5 years 1 month 13 days	5 years 3 months	5 years 3 months	5 years 3 months
Volatility	25.00%	25.00%	25.00%	25.00%
Exercise price	$ 11.50	$ 11.50	$ 11.50	$ 11.50
Underlying value	$ 13.97	$ 9.50	$ 9.96	$ 10.08

Fair Value Measurements (Details) - Schedule of private placement warrants and public warrants - Stable Road Acquisition Corp [Member] - Private Placement [Member]	6 Months Ended
	Jun. 30, 2021 USD ($)
Fair Value Measurements (Details) - Schedule of private placement warrants and public warrants [Line Items]
Fair value as of December 31, 2020	$ 2,452,500
Change in valuation inputs or other assumptions	(1,223,525)
Fair value as of June 30, 2021	$ 1,228,975

Restatement of Previously Issued Consolidated Financial Statements (Details)	12 Months Ended
	Dec. 31, 2020
Stable Road Acquisition Corp [Member]
Restatement of Previously Issued Consolidated Financial Statements (Details) [Line Items]
Outstanding percentage	50.00%

Restatement of Previously Issued Consolidated Financial Statements (Details) - Schedule of financial statement - Stable Road Acquisition Corp [Member] - USD ($)	3 Months Ended			6 Months Ended	7 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2020	Dec. 31, 2020	Nov. 13, 2019
As Previously Reported [Member]
Condensed Financial Statements, Captions [Line Items]
Warrant Liabilities
Total Liabilities	6,989,141	7,038,476	7,240,139	7,038,476	7,095,309	6,989,141	9,385,896	6,902,150
Class A Common Stock Subject to Possible Redemption	162,243,730	162,408,340	162,371,970	162,408,340	162,112,500	162,243,730	159,347,050	162,038,390
Class A Common Stock	157	155	156	155	158	157	186	159
Additional Paid-in Capital	4,805,825	4,641,217	4,677,586	4,641,217	4,937,054	4,805,825	7,702,476	5,011,163
(Accumulated Deficit) Retained Earnings	193,592	358,202	321,830	358,202	62,359	193,592	(2,703,091)	(11,750)
Total Stockholders’ Equity	5,000,005	5,000,005	5,000,003	5,000,005	5,000,002	5,000,005	5,000,002	5,000,003
Statement of operations for period from May 28, 2019 (inception) through December 31, 2019 (audited)
Net income (loss)	(164,610)	36,372	259,471	295,843	62,359	131,233	(2,765,450)
Transaction costs allocable to warrant liabilities
Change in fair value of warrant liabilities
Transaction Costs
Change in fair value of warrant liabilities
Basic and diluted net income (loss) per share, Class A and Class B non-redeemable common stock (in Dollars per share)	$ (0.04)	$ (0.05)	$ (0.04)	$ (0.09)		$ (0.13)	$ (0.72)
Basic net loss per share, Class A and Class B non-redeemable common stock (in Dollars per share)					$ (0.03)
Diluted net loss per share, Class A and Class B non-redeemable common stock (in Dollars per share)
Number of Class A common stock subject to redemption								16,203,839
Adjustments [Member]
Condensed Financial Statements, Captions [Line Items]
Warrant Liabilities	$ 10,424,088	$ 5,721,775	$ 6,907,475	$ 5,721,775	$ 7,857,175	$ 10,424,088	$ 48,077,888	13,996,325
Total Liabilities	10,424,088	5,721,775	6,907,475	5,721,775	7,857,175	10,424,088	48,077,888	13,996,325
Class A Common Stock Subject to Possible Redemption	(10,424,090)	(5,721,780)	(6,907,480)	(5,721,780)	(7,857,180)	(10,424,090)	(48,077,890)	(13,996,330)
Class A Common Stock	104	57	69	57	78	104	480	140
Additional Paid-in Capital	61,046	(4,641,217)	(4,677,586)	(4,641,217)	(4,937,054)	61,046	37,714,470	857,554
(Accumulated Deficit) Retained Earnings	(61,148)	4,641,165	4,677,522	4,641,165	4,936,981	(61,148)	(37,714,948)	(857,689)
Total Stockholders’ Equity	2	5	5	5	5	2	2	5
Statement of operations for period from May 28, 2019 (inception) through December 31, 2019 (audited)
Net income (loss)	(4,702,313)	1,185,700	949,700	2,135,400	5,281,461	(2,566,913)	(40,220,713)
Transaction costs allocable to warrant liabilities					857,689
Change in fair value of warrant liabilities			(949,700)	(2,135,400)	(6,139,150)	$ 2,566,913	$ 40,220,713
Transaction Costs					(857,689)
Change in fair value of warrant liabilities	$ (4,702,313)	$ 1,185,700	$ 949,700	$ 2,135,400	$ 6,139,150
Basic and diluted net income (loss) per share, Class A and Class B non-redeemable common stock (in Dollars per share)	$ (0.96)	$ 0.24	$ 0.20	$ 0.44		$ (0.53)	$ (8.28)
Basic net loss per share, Class A and Class B non-redeemable common stock (in Dollars per share)					$ 1.31
Diluted net loss per share, Class A and Class B non-redeemable common stock (in Dollars per share)					$ 1.24
Number of Class A common stock subject to redemption								(1,399,633)
As Restated [Member]
Condensed Financial Statements, Captions [Line Items]
Warrant Liabilities	$ 10,424,088	$ 5,721,775	$ 6,907,475	$ 5,721,775	$ 7,857,175	$ 10,424,088	$ 48,077,888	13,996,325
Total Liabilities	17,413,229	12,760,251	14,147,614	12,760,251	14,952,484	17,413,229	57,463,784	20,898,475
Class A Common Stock Subject to Possible Redemption	151,819,640	156,686,560	155,464,490	156,686,560	154,255,320	151,819,640	111,269,160	148,042,060
Class A Common Stock	261	212	225	212	236	261	666	299
Additional Paid-in Capital	4,866,871	0	0	0	0	4,866,871	45,416,946	5,868,717
(Accumulated Deficit) Retained Earnings	132,444	4,999,367	4,999,352	4,999,367	4,999,340	132,444	(40,418,039)	(869,439)
Total Stockholders’ Equity	5,000,007	5,000,010	5,000,008	5,000,010	5,000,004	5,000,007	5,000,004	5,000,008
Statement of operations for period from May 28, 2019 (inception) through December 31, 2019 (audited)
Net income (loss)	(4,866,923)	1,222,072	1,209,171	2,431,243	5,343,820	(2,435,680)	(42,986,163)
Transaction costs allocable to warrant liabilities					857,689
Change in fair value of warrant liabilities			(949,700)	(2,135,400)	(6,139,150)	$ 2,566,913	$ 40,220,713
Transaction Costs					(857,689)
Change in fair value of warrant liabilities	$ (4,702,313)	$ 1,185,700	$ 949,700	$ 2,135,400	$ 6,139,150
Basic and diluted net income (loss) per share, Class A and Class B non-redeemable common stock (in Dollars per share)	$ (1.00)	$ 0.19	$ 0.16	$ 0.35		$ (0.66)	$ (9.00)
Basic net loss per share, Class A and Class B non-redeemable common stock (in Dollars per share)					$ 1.28
Diluted net loss per share, Class A and Class B non-redeemable common stock (in Dollars per share)					$ 1.24
Number of Class A common stock subject to redemption								$ 14,804,206

Summary of Significant Accounting Policies (Details) - Schedule of calculation of basic and diluted net income (loss) per common share - Stable Road Acquisition Corp [Member] - USD ($)	7 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020
Numerator: Net Income (loss) allocable to Redeemable Class A Common Stock
Interest Income	$ 346,011	$ 1,134,391
Income and Franchise Tax	(167,069)	(378,916)
Redeemable Net Income	$ 178,942	$ 755,475
Redeemable Class A Common Stock, Basic and Diluted	17,250,000	17,250,000
Net Income (loss)/Basic and Diluted Redeemable Class A Common Stock	$ 0.01	$ 0.04
Numerator: Net Income (loss) minus Redeemable Net Income (loss)
Net Income (loss)	$ 5,343,820	$ (42,986,163)
Redeemable Net Income (loss)	$ (178,942)	$ (755,475)
Non-Redeemable Net Income (loss)	$ 5,164,878	$ (43,741,638)
Denominator: Weighted Average Non-Redeemable Class A and B Common Stock
Non-Redeemable Class A and B Common Stock, Basic	4,041,761	4,857,500
Net Income (loss)/Basic Non-Redeemable Class A and B Common Stock	1.28	(9.00)
Non-Redeemable Class A and B Common Stock, Diluted	4,168,777	4,857,500
Net Income (loss)/Diluted Non-Redeemable Class A and B Common Stock	1.24	(9.00)

Income Tax (Details) - Schedule of net deferred tax assets - Stable Road Acquisition Corp [Member] - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Income Tax (Details) - Schedule of net deferred tax assets [Line Items]
Organizational costs/Startup expenses	$ 763,877	$ 24,483
Total deferred tax asset	763,877	24,483
Valuation allowance	(763,877)	(24,483)
Deferred tax asset, net of allowance

Income Tax (Details) - Schedule of net income tax provision - Stable Road Acquisition Corp [Member] - USD ($)	3 Months Ended		6 Months Ended		7 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020
Income Tax (Details) - Schedule of net income tax provision [Line Items]
Current					$ 47,567	$ 178,866
Deferred					(24,483)	(739,394)
Change in valuation allowance					24,483	739,394
Income tax provision		$ 3,757		$ 177,196	$ 47,567	$ 178,866