Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Receivable For Warrant Exercises	Receivable for “At-the-market” Offering	Accumulated Deficit
Beginning Balance (in shares) at Dec. 31, 2020			144,912,362	132,354,128
Beginning Balance at Dec. 31, 2020	$ 907,130		$ 1	$ 1	$ 1,055,128	$ (96)	$ 0	$ (147,904)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	5,622				5,622
Exercise of stock options and restricted stock awards, net of statutory tax withholding (in shares)			1,656,424
Exercise of stock options and restricted stock awards, net of statutory tax withholding	403				403
Receivable for warrant exercises collected	459					459
Exercise of warrants (in shares)			27,751,587
Exercise of warrants	365,080		$ 1		365,464	(385)
Shares surrendered upon exercise of warrants (in shares)			(9,943,067)
Stock issuance costs and redemption payments	0				(22)	22
Purchase of capped call option	(96,788)				(96,788)
Recognition of Magna warrants	89,477				89,477
Net loss	(471,341)							(471,341)
Ending Balance (in shares) at Dec. 31, 2021			164,377,306	132,354,128
Ending Balance at Dec. 31, 2021	800,042		$ 2	$ 1	1,419,284	0	0	(619,245)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 19,602				19,602
Exercise of stock options and restricted stock awards, net of statutory tax withholding (in shares)	213,048		704,565
Exercise of stock options and restricted stock awards, net of statutory tax withholding	$ 592				592
Recognition of Magna warrants	20,778				20,778
Shares issued under "At-the-market" offering, net of stock issuance costs (in shares)			22,517,941
Shares issued under “At-the-market” offering, net of stock issuance costs	186,987				189,940		(2,953)
Net loss	(547,496)							(547,496)
Ending Balance (in shares) at Dec. 31, 2022			187,599,812	132,354,128
Ending Balance at Dec. 31, 2022	480,505		$ 2	$ 1	1,650,196	0	(2,953)	(1,166,741)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 8,176				8,176
Exercise of stock options and restricted stock awards, net of statutory tax withholding (in shares)	60,340		1,707,065
Exercise of stock options and restricted stock awards, net of statutory tax withholding	$ 89				89
Recognition of Magna warrants	6,000				6,000
Shares issued under "At-the-market" offering, net of stock issuance costs (in shares)			21,153,154
Shares issued under “At-the-market” offering, net of stock issuance costs	133,657				130,704		2,953
Conversion of 2025 Senior Notes (in shares)			106,129,828
Conversion of 2025 Senior Notes	213,438	$ 1			213,437
Net loss	(939,947)							(939,947)
Ending Balance (in shares) at Dec. 31, 2023			316,589,859	132,354,128
Ending Balance at Dec. 31, 2023	$ (98,082)		$ 3	$ 1	$ 2,008,602	$ 0	$ 0	$ (2,106,688)