Notes Payable - 2023 Unsecured SPA Notes Narrative (Details) - Notes Payable - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Jan. 28, 2025	Dec. 31, 2024	Dec. 21, 2024	Sep. 05, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Notes and loans payable	$ 24,674	$ 63,769		$ 49,488			$ 91,150
Gain (loss) on fair value adjustment of debts	$ 21,780	27,721
Unsecured Convertible Note
Debt Instrument [Line Items]
Conversion price (in dollars per share)	$ 1.16
Debt instrument, term (in years)	6 years
Notes and loans payable	$ 0	9,050		6,716			$ 11,938
Notes payable				6,700
Proceeds from debt, net of issuance costs	0
Debt conversion, converted amount	$ 4,400
Shares issued from conversion (in shares)	4,167,764
Gain (loss) on fair value adjustment of debts	$ 2,024	2,888
Gain (loss) on fair value adjustment of debts, favorable, net		$ 2,900
Unsecured Convertible Note | Class A Common Stock
Debt Instrument [Line Items]
Debt instrument, fixed conversion price percentage	90.00%
Gain (loss) extinguishments of debt	$ (2,800)
Unsecured SPA Notes
Debt Instrument [Line Items]
Percent of purchaser's conversion shares	33.00%
Junior Secured SPA Notes
Debt Instrument [Line Items]
Notes payable bearing interest rate						10.00%
Conversion price (in dollars per share)			$ 5.24		$ 1.16	$ 5.24
Debt instrument, term (in years)	1 year
Notes and loans payable	$ 6,060			$ 26,059
Proceeds from debt, net of issuance costs	7,600
Gain (loss) on fair value adjustment of debts	10,435
Junior Secured SPA Notes | Class A Common Stock
Debt Instrument [Line Items]
Debt conversion, converted amount	$ 15,400
Shares issued from conversion (in shares)	113,958,070
Gain (loss) extinguishments of debt	$ (12,800)
Minimum | Unsecured Convertible Note
Debt Instrument [Line Items]
Notes payable bearing interest rate	10.00%			10.00%
Maximum | Unsecured Convertible Note
Debt Instrument [Line Items]
Notes payable bearing interest rate	15.00%			15.00%