Condensed Consolidated Statement of Stockholders’ Equity (Unaudited) - USD ($) $ in Thousands	Total	Notes Payable	Common Stock Class A Common Stock	Common Stock Class A Common Stock Notes Payable	Common Stock Class B Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Notes Payable	Accumulated Other Comprehensive Income	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2022			2,347,276		266,670
Beginning balance at Dec. 31, 2022	$ 200,992		$ 0		$ 0	$ 3,724,242		$ 3,505	$ (3,526,755)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of notes payable and accrued interest into Class A Common Stock (Note 7) (in shares)				931,416
Conversion of notes payable and accrued interest into Class A Common Stock (Note 7)		$ 138,180					$ 138,180
Change in classification of warrants from Additional paid-in capital to liability pursuant to the Warrant Exchange (Note 7)	(6,811)					(6,811)
Reclassification of earnout shares liability to equity due to authorized share increase	5,014					5,014
Reclassification of stock-based awards liability to equity due to authorized share increase	8,978					8,978
Stock-based compensation	3,631					3,631
Exercise of warrants (in shares)			213,037
Exercise of warrants	51,276					51,276
Exercise of stock options (in shares)			207
Exercise of stock options	44					44
Issuance of shares for RSU vesting net of tax withholdings (in shares)			3,367
Issuance of shares for RSU vesting net of tax withholdings	1					1
Foreign currency translation adjustment	(555)							(555)
Net loss	(144,973)								(144,973)
Ending balance (in shares) at Mar. 31, 2023			3,495,303		266,670
Ending balance at Mar. 31, 2023	255,777		$ 0		$ 0	3,924,555		2,950	(3,671,728)
Beginning balance (in shares) at Dec. 31, 2022			2,347,276		266,670
Beginning balance at Dec. 31, 2022	200,992		$ 0		$ 0	3,724,242		3,505	(3,526,755)
Ending balance (in shares) at Dec. 31, 2023			42,433,025		266,670
Ending balance at Dec. 31, 2023	228,236		$ 4		$ 0	4,180,869		5,862	(3,958,499)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of notes payable and accrued interest into Class A Common Stock (Note 7) (in shares)				116,945,093
Conversion of notes payable and accrued interest into Class A Common Stock (Note 7)		$ 20,726		$ 12			$ 20,714
Reverse Stock split related round up share issuances (in shares)			12,266
Stock-based compensation	542					542
Foreign currency translation adjustment	232							232
Net loss	(48,217)								(48,217)
Ending balance (in shares) at Mar. 31, 2024			159,390,384		266,670
Ending balance at Mar. 31, 2024	$ 201,519		$ 16		$ 0	$ 4,202,125		$ 6,094	$ (4,006,716)