Unaudited Condensed Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands	Total	Notes Payable	Additional Paid-in Capital	Additional Paid-in Capital Notes Payable	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Class A Common Stock Common Stock	Class A Common Stock Common Stock Notes Payable	Class B Common Stock Common Stock
Beginning balance (in shares) at Dec. 31, 2023							1,060,833		6,667
Beginning balance at Dec. 31, 2023	$ 228,236		$ 4,180,873		$ 5,862	$ (3,958,499)	$ 0		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of notes payable and accrued interest into Class A Common Stock (in shares)								2,923,628
Conversion of notes payable and accrued interest into Class A Common Stock		$ 20,726		$ 20,726
Reverse stock split related round up share issuances (in shares)							307
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							3,984,768		6,667
Ending balance at Mar. 31, 2024	201,519		4,202,141		6,094	(4,006,716)	$ 0		$ 0
Beginning balance (in shares) at Dec. 31, 2024							65,919,127		6,667
Beginning balance at Dec. 31, 2024	114,967		4,421,563		7,744	(4,314,346)	$ 6		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of notes payable and accrued interest into Class A Common Stock (in shares)								20,081,506
Conversion of notes payable and accrued interest into Class A Common Stock		$ 32,673		$ 32,671				$ 2
Settlement of HSL s.r.l. lawsuit with issuance of Class A Common Stock (in shares)							774,183
Settlement of HSL s.r.l. lawsuit with issuance of Class A Common Stock	1,185		1,185
Stock-based compensation	301		301
Issuance of shares for RSU vesting net of tax withholdings (in shares)							11,932
Chongqing related party debt restructuring	654		654
Foreign currency translation adjustment	306				306
Net loss	(10,278)					(10,278)
Ending balance (in shares) at Mar. 31, 2025							86,786,748		6,667
Ending balance at Mar. 31, 2025	$ 139,808		$ 4,456,374		$ 8,050	$ (4,324,624)	$ 8		$ 0