Condensed Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Additional Paid-in Capital	Receivable for stock issuance	Accumulated Deficit	Class A Common Stock Common Stock	Class B Common Stock Common Stock
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	6,260	6,260
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings (in shares)					514,223
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings	514	514
Recognition of Magna warrants	$ 13,389	13,389
Shares issued under "At-the-market" offering, net of stock issuance costs (in shares)	1,388,151
Shares issued under "At-the-market" offering, net of stock issuance costs	$ 14,215	14,215
Net Loss	(228,050)			(228,050)
Ending balance (in shares) at Jun. 30, 2022					166,279,680	132,354,128
Ending balance at Jun. 30, 2022	606,370	1,453,662		(847,295)	$ 2	$ 1
Beginning balance (in shares) at Mar. 31, 2022					164,836,936	132,354,128
Beginning balance at Mar. 31, 2022	690,026	1,431,342		(741,319)	$ 2	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,195	1,195
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings (in shares)					54,593
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings	216	216
Recognition of Magna warrants	6,694	6,694
Shares issued under "At-the-market" offering, net of stock issuance costs (in shares)					1,388,151
Shares issued under "At-the-market" offering, net of stock issuance costs	14,215	14,215
Net Loss	(105,976)			(105,976)
Ending balance (in shares) at Jun. 30, 2022					166,279,680	132,354,128
Ending balance at Jun. 30, 2022	606,370	1,453,662		(847,295)	$ 2	$ 1
Beginning balance (in shares) at Dec. 31, 2022					187,599,812	132,354,128
Beginning balance at Dec. 31, 2022	480,505	1,650,196	$ (2,953)	(1,166,741)	$ 2	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 7,384	7,384
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings (in shares)	58,151				1,426,271
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings	$ 26	26
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	133,674	130,721	2,953
Net Loss	(203,162)			(203,162)
Ending balance (in shares) at Jun. 30, 2023					210,179,237	132,354,128
Ending balance at Jun. 30, 2023	424,427	1,794,327	0	(1,369,903)	$ 2	$ 1
Beginning balance (in shares) at Mar. 31, 2023					197,843,646	132,354,128
Beginning balance at Mar. 31, 2023	407,690	1,704,622	(9,639)	(1,287,296)	$ 2	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	9,026	9,026
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings (in shares)					66,517
Exercise of stock options and issuance of restricted stock unit awards, net of statutory tax withholdings	6	6
Recognition of Magna warrants	3,770	3,770
Shares issued under "At-the-market" offering, net of stock issuance costs (in shares)					12,269,074
Shares issued under "At-the-market" offering, net of stock issuance costs	86,542	76,903	9,639
Net Loss	(82,607)			(82,607)
Ending balance (in shares) at Jun. 30, 2023					210,179,237	132,354,128
Ending balance at Jun. 30, 2023	$ 424,427	$ 1,794,327	$ 0	$ (1,369,903)	$ 2	$ 1