Condensed Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Additional Paid-in Capital	Receivable For Warrant Exercises	Accumulated deficit	Class A Common Stock Common Stock	Class B Common Stock Common Stock
Beginning balance (in shares) at Dec. 31, 2020					144,912,362	132,354,128
Beginning balance at Dec. 31, 2020	$ 907,130	$ 1,055,128	$ (96)	$ (147,904)	$ 1	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	4,078	4,078
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings (in shares)					1,095,446
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings	(53)	(53)
Exercise of warrants (in shares)					27,751,587
Exercise of warrants	365,922	365,463	458		$ 1
Shares surrendered upon exercise of warrants (in shares)					(9,943,067)
Shares surrendered upon exercise of warrants	(384)		(384)
Purchase of capped call option	(96,788)	(96,788)
Stock issuance costs and redemption of unexercised warrants	0	(22)	22
Recognition of Magna warrants	58,040	58,040
Net loss	(332,909)			(332,909)
Ending balance (in shares) at Sep. 30, 2021					163,816,328	132,354,128
Ending balance at Sep. 30, 2021	905,036	1,385,846	0	(480,813)	$ 2	$ 1
Beginning balance (in shares) at Jun. 30, 2021					163,711,901	132,354,128
Beginning balance at Jun. 30, 2021	1,110,590	1,481,556		(370,969)	$ 2	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,043	1,043
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings (in shares)					104,427
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings	35	35
Purchase of capped call option	(96,788)	(96,788)
Net loss	(109,844)			(109,844)
Ending balance (in shares) at Sep. 30, 2021					163,816,328	132,354,128
Ending balance at Sep. 30, 2021	905,036	1,385,846	$ 0	(480,813)	$ 2	$ 1
Beginning balance (in shares) at Dec. 31, 2021					164,377,306	132,354,128
Beginning balance at Dec. 31, 2021	800,042	1,419,284		(619,245)	$ 2	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 17,426	17,426
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings (in shares)	186,491				624,502
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings	$ 556	556
Recognition of Magna warrants	20,084	20,084
Shares issued under "At-the-market" offering, net of stock issuance costs (in shares)					14,491,359
Shares issued under "At-the-market" offering, net of stock issuance costs	129,972	129,972
Net loss	(377,392)			(377,392)
Ending balance (in shares) at Sep. 30, 2022					179,493,167	132,354,128
Ending balance at Sep. 30, 2022	590,688	1,587,322		(996,637)	$ 2	$ 1
Beginning balance (in shares) at Jun. 30, 2022					166,279,680	132,354,128
Beginning balance at Jun. 30, 2022	606,370	1,453,662		(847,295)	$ 2	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	11,166	11,166
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings (in shares)					110,279
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings	41	41
Recognition of Magna warrants	6,695	6,695
Shares issued under "At-the-market" offering, net of stock issuance costs (in shares)					13,103,208
Shares issued under "At-the-market" offering, net of stock issuance costs	115,758	115,758
Net loss	(149,342)			(149,342)
Ending balance (in shares) at Sep. 30, 2022					179,493,167	132,354,128
Ending balance at Sep. 30, 2022	$ 590,688	$ 1,587,322		$ (996,637)	$ 2	$ 1