Notes Payable - 2025 March Unsecured SPA Notes Narrative (Details) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended
	May 28, 2025 $ / shares	Mar. 21, 2025 USD ($) day closing $ / shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	May 15, 2025 $ / shares	Dec. 31, 2024 USD ($) $ / shares	Jul. 31, 2024 $ / shares	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Exercise price (in dollars per share) | $ / shares										$ 110,400
2024 Unsecured SPA Warrants
Debt Instrument [Line Items]
Debt instrument, term (in years)					5 years
Exercise price (in dollars per share) | $ / shares			$ 1.22		$ 1.22
2024 Unsecured SPA Warrants | Class A Common Stock
Debt Instrument [Line Items]
Exercise price (in dollars per share) | $ / shares			$ 1.22		$ 1.22				$ 1.39
2025 March Unsecured SPA Notes
Debt Instrument [Line Items]
Percent of purchaser's conversion shares			100.00%		100.00%
Notes Payable
Debt Instrument [Line Items]
Notes and loans payable			$ 78,902	$ 55,500	$ 78,902	$ 55,500	$ 28,033		$ 49,488		$ 77,394	$ 91,150
Gain (loss) on extinguishment of debt				(2,699)		(2,699)
Gain (loss) on fair value adjustment of debts			$ 18,074	$ 14,881	$ 31,131	$ 35,690
2025 March Unsecured SPA Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 41,000
Debt instrument, number of closings | closing		4
Debt instrument, term (in years)		5 years
Contractual Interest Rates		10.00%
Debt instrument, redemption price, percentage		10.00%
Redemption price, percentage		25.00%
Conversion price (in dollars per share) | $ / shares	$ 1.22	$ 1.29	$ 1.16		$ 1.16
Debt instrument, floor price (in dollars per share) | $ / shares		$ 1.048
Debt instrument, SPA waiver, term								45 days
Debt instrument, SPA waiver, deferral period								20 days
Share price (in dollars per share) | $ / shares								$ 1.00
Debt instrument, convertible, threshold percentage of stock price trigger	100.00%
Debt instrument, exercisable, threshold percentage of stock price trigger	120.00%
Exercise price (in dollars per share) | $ / shares	$ 1.464		$ 1.392		$ 1.392
Proceeds from debt, net of issuance costs					$ 7,500
2025 March Unsecured SPA Notes | Series B Preferred Stock
Debt Instrument [Line Items]
Pro rata aggregate cap (in shares) | shares			9,000,000		9,000,000
2025 March Unsecured SPA Notes | Notes Payable
Debt Instrument [Line Items]
Debt instrument, term (in years)					5 years
Contractual Interest Rates		18.00%	10.00%		10.00%
Redemption price, percentage		8.00%
Debt instrument, convertible, threshold consecutive trading days (in days) | day		5
Notes and loans payable			$ 7,211		$ 7,211		$ 9,297		$ 0
Proceeds from debt, net of issuance costs			8,100		32,200
Debt conversion, converted amount			$ 9,300		$ 16,000
Shares issued from conversion (in shares) | shares			8,429,301		14,598,957
Gain (loss) on fair value adjustment of debts			$ 2,987		$ 274
2025 March Unsecured SPA Notes | Notes Payable | Class A Common Stock
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt			$ (9,800)		$ (15,300)