Related Party Transactions - Schedule of Related Party Debt Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Related Party Debt Rollforward [Abstract]
Fair value measurement adjustments	$ 21,439	$ 19,653
Debt issuance costs	6,044	4,886
Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	8,064	9,760
New Issuances	1,905	3,074
Repayments of Debt	(2,540)	(125)
Conversion of Debt to Equity	(2,564)	(435)
Fair Value Adjustments of Debt	(705)	(242)
Reclassification of Debt Between Debt Categories	0
Other Adjustments	119	(3,968)
Ending balance	4,279	8,064
Fair value measurement adjustments	2,826	1
Debt issuance costs	189
2025 March Unsecured SPA Notes | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	0
New Issuances	1,435
Repayments of Debt	0
Conversion of Debt to Equity	(1,837)
Fair Value Adjustments of Debt	(49)
Reclassification of Debt Between Debt Categories	451
Other Adjustments	0
Ending balance	0	0
Unsecured Convertible Notes | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	1,364
New Issuances	470
Repayments of Debt	0
Conversion of Debt to Equity	(727)
Fair Value Adjustments of Debt	(656)	(100)
Reclassification of Debt Between Debt Categories	(451)
Other Adjustments	0
Ending balance	0	1,364
2023 Unsecured Convertible Note | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	0	542
New Issuances		0
Repayments of Debt		0
Conversion of Debt to Equity		(435)
Fair Value Adjustments of Debt		(107)
Other Adjustments		0
Ending balance		0
Unsecured SPA Notes | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	1,364	0
New Issuances		1,499
Repayments of Debt		0
Conversion of Debt to Equity		0
Fair Value Adjustments of Debt		(135)
Other Adjustments		0
Ending balance		1,364
Notes Payable — China | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	4,382	3,789
New Issuances	0	0
Repayments of Debt	(714)	(125)
Conversion of Debt to Equity	0	0
Fair Value Adjustments of Debt	0	0
Reclassification of Debt Between Debt Categories	0
Other Adjustments	107	718
Ending balance	3,775	4,382
Notes Payable on Demand — China | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	417	5,103
New Issuances	0	0
Repayments of Debt	0	0
Conversion of Debt to Equity	0	0
Fair Value Adjustments of Debt	0	0
Reclassification of Debt Between Debt Categories	0
Other Adjustments	12	(4,686)
Ending balance	429	417
Convertible FFGP Note | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	250	0
New Issuances	0	250
Repayments of Debt	(250)	0
Conversion of Debt to Equity	0	0
Fair Value Adjustments of Debt	0	0
Reclassification of Debt Between Debt Categories	0
Other Adjustments	0	0
Ending balance	0	250
FFGP Note | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	1,576	326
New Issuances	0	1,250
Repayments of Debt	(1,576)	0
Conversion of Debt to Equity	0	0
Fair Value Adjustments of Debt	0	0
Reclassification of Debt Between Debt Categories	0
Other Adjustments	0	0
Ending balance	0	1,576
Other Notes | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	75	0
New Issuances	0	75
Repayments of Debt	0	0
Conversion of Debt to Equity	0	0
Fair Value Adjustments of Debt	0	0
Reclassification of Debt Between Debt Categories	0
Other Adjustments	0	0
Ending balance	$ 75	$ 75