Condensed Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Accumulated Deficit	Class A Common Stock	Class A Common Stock Common Stock	Class B Common Stock	Class B Common Stock Common Stock
Beginning balance at Dec. 31, 2020	$ 148,741	$ 733,175	$ 34	$ 0	$ (584,501)		$ 22		$ 11
Beginning balance (in shares) at Dec. 31, 2020							218,818,037		105,118,203,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of warrants (in shares)							15,574,037
Issuance of Class A common stock upon exercise of warrants	492,220	492,219					$ 1
Issuance of Class A common stock upon exercise of stock options (in shares)							183,918
Issuance of Class A common stock upon exercise of stock options	322	322
Share-based compensation	1,843	1,843
Other comprehensive loss	(43)		(43)
Net loss	(75,923)				(75,923)
Ending balance at Mar. 31, 2021	567,160	1,227,559	(9)	0	(660,424)		$ 23		$ 11
Ending balance (in shares) at Mar. 31, 2021							234,575,992		105,118,203,000
Beginning balance at Dec. 31, 2021	197,985	1,257,214	(908)	(235,871)	(822,487)		$ 27		$ 10
Beginning balance (in shares) at Dec. 31, 2021							266,076,525		97,088,670
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon exercise of warrants (in shares)						401,365
Issuance of Class A common stock upon exercise of warrants	$ 18,689	18,689
Issuance of Class A common stock upon exercise of stock options (in shares)	654,935
Issuance of Class A common stock upon exercise of stock options and vesting of restricted stock units (in shares)							2,117,059
Issuance of Class A common stock upon exercise of stock options and vesting of restricted stock units	$ 1,085	1,085
Retirement of unvested restricted common stock (in shares)							(40,763)
Vendor payments in shares in lieu of cash (in shares)							1,424,350
Vendor payments in shares in lieu of cash	14,613	14,613
Share-based compensation	23,657	23,657
Payments of employee taxes related to vested restricted stock units	(516)	(516)
Shares repurchased	(39,648)			(39,648)
Other comprehensive loss	(3,648)		(3,648)
Net loss	(88,333)				(88,333)
Ending balance at Mar. 31, 2022	$ 123,884	$ 1,314,742	$ (4,556)	$ (275,519)	$ (910,820)		$ 27		$ 10
Ending balance (in shares) at Mar. 31, 2022						269,978,536	269,978,536	97,088,670	97,088,670