Consolidated Statements of Convertible Preferred Stock and Stockholders’ Equity (Deficit) - USD ($) $ in Thousands	Total	Founders Preferred Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Series A Convertible Preferred Stock	Class A Common Stock	Class A Common Stock Common Stock	Class B Common Stock	Class B Common Stock Common Stock
Beginning balance (in shares) at Dec. 31, 2019						94,818,151
Beginning balance at Dec. 31, 2019						$ 244,743
Ending balance (in shares) at Jun. 30, 2020						94,818,151
Ending balance at Jun. 30, 2020						$ 244,743
Beginning balance (in shares) at Dec. 31, 2019		26,206,837
Beginning balance at Dec. 31, 2019	$ (211,730)	$ 3	$ 10,457	$ (1)	$ (222,203)			$ 14		$ 0
Beginning balance (in shares) at Dec. 31, 2019								139,635,890		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	3,432		3,432
Other comprehensive income	9			9
Net loss	(41,016)				(41,016)
Ending balance (in shares) at Jun. 30, 2020		26,206,837
Ending balance at Jun. 30, 2020	(249,305)	$ 3	13,889	8	(263,219)			$ 14		$ 0
Ending balance (in shares) at Jun. 30, 2020								139,635,890		0
Beginning balance (in shares) at Mar. 31, 2020						94,818,151
Beginning balance at Mar. 31, 2020						$ 244,743
Ending balance (in shares) at Jun. 30, 2020						94,818,151
Ending balance at Jun. 30, 2020						$ 244,743
Beginning balance (in shares) at Mar. 31, 2020		26,206,837
Beginning balance at Mar. 31, 2020	(226,177)	$ 3	11,598	(8)	(237,784)			$ 14		$ 0
Beginning balance (in shares) at Mar. 31, 2020								139,635,890		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,291		2,291
Other comprehensive income	16			16
Net loss	(25,435)				(25,435)
Ending balance (in shares) at Jun. 30, 2020		26,206,837
Ending balance at Jun. 30, 2020	(249,305)	$ 3	13,889	8	(263,219)			$ 14		$ 0
Ending balance (in shares) at Jun. 30, 2020								139,635,890		0
Beginning balance (in shares) at Dec. 31, 2020						0
Beginning balance at Dec. 31, 2020						$ 0
Ending balance (in shares) at Jun. 30, 2021						0
Ending balance at Jun. 30, 2021						$ 0
Beginning balance (in shares) at Dec. 31, 2020		0
Beginning balance at Dec. 31, 2020	148,741	$ 0	733,175	34	(584,501)			$ 22		$ 11
Beginning balance (in shares) at Dec. 31, 2020								218,818,037		105,118,203
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of SAFE into Series A common stock and Issuance of Class A common stock upon exercise of warrants (in shares)								17,665,650
Conversion of SAFE into Series A common stock and Issuance of Class A common stock upon exercise of warrants	495,427		495,425					$ 2
Share-based compensation	15,758		15,758
Payments of employee taxes related to vested restricted stock units	(140)		(140)
Cash received from Gores on settlement of recapitalization of escrow	10		10
Other comprehensive income	(27)			(27)
Net loss	(112,753)				(112,753)
Ending balance (in shares) at Jun. 30, 2021		0
Ending balance at Jun. 30, 2021	547,016	$ 0	1,244,228	7	(697,254)			$ 24		$ 11
Ending balance (in shares) at Jun. 30, 2021							236,483,687	236,483,687	105,118,203	105,118,203
Beginning balance (in shares) at Mar. 31, 2021						0
Beginning balance at Mar. 31, 2021						$ 0
Ending balance (in shares) at Jun. 30, 2021						0
Ending balance at Jun. 30, 2021						$ 0
Beginning balance (in shares) at Mar. 31, 2021		0
Beginning balance at Mar. 31, 2021	567,160	$ 0	1,227,559	(9)	(660,424)			$ 23		$ 11
Beginning balance (in shares) at Mar. 31, 2021								234,575,992		105,118,203
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of stock options and vesting of restricted stock units (in shares)								1,907,695
Issuance of Class A common stock upon exercise of stock options and vesting of restricted stock units	2,885		2,884					$ 1
Share-based compensation	13,915		13,915
Payments of employee taxes related to vested restricted stock units	(140)		(140)
Cash received from Gores on settlement of recapitalization of escrow	10		10
Other comprehensive income	16			16
Net loss	(36,830)				(36,830)
Ending balance (in shares) at Jun. 30, 2021		0
Ending balance at Jun. 30, 2021	$ 547,016	$ 0	$ 1,244,228	$ 7	$ (697,254)			$ 24		$ 11
Ending balance (in shares) at Jun. 30, 2021							236,483,687	236,483,687	105,118,203	105,118,203