Related Party Transactions - Schedule of Related Party Debt Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Related Party Debt Rollforward [Abstract]
Fair value measurement adjustments	$ 3,341	$ 10,097
Debt issuance costs	1,160	429
Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	4,279	8,064	$ 8,064
New Issuances		622
Repayments of debt	(145)	(124)
Conversion of Debt to Equity		(727)
Fair Value Adjustments of Debt		(665)
Other Adjustments	58	(47)
Ending balance	4,192	7,123	4,279
Fair value measurement adjustments		1,252
Debt issuance costs		75
2025 March Unsecured SPA Notes | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	0	0	0
New Issuances		152
Repayments of debt		0
Conversion of Debt to Equity		0
Fair Value Adjustments of Debt		(9)
Other Adjustments		0
Ending balance	0	143	0
Unsecured SPA Notes | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance		1,364	1,364
New Issuances		470
Repayments of debt		0
Conversion of Debt to Equity		(727)
Fair Value Adjustments of Debt		(656)
Other Adjustments		0
Ending balance		451
Notes Payable — China | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	3,775	4,382	4,382
New Issuances		0
Repayments of debt	(145)	(124)
Conversion of Debt to Equity		0
Fair Value Adjustments of Debt		0
Other Adjustments	52	(43)
Ending balance	3,682	4,215	3,775
Notes Payable on Demand — China | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	429	417	417
New Issuances		0
Repayments of debt	0	0
Conversion of Debt to Equity		0
Fair Value Adjustments of Debt		0
Other Adjustments	6	(4)
Ending balance	435	413	429
Convertible FFGP Note | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance		250	250
New Issuances		0
Repayments of debt		0	(300)
Conversion of Debt to Equity		0
Fair Value Adjustments of Debt		0
Other Adjustments		0
Ending balance		250
FFGP Note | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance		1,576	1,576
New Issuances		0
Repayments of debt	(1,600)	0
Conversion of Debt to Equity		0
Fair Value Adjustments of Debt		0
Other Adjustments		0
Ending balance		1,576
Other Notes | Related Party
Related Party Debt Rollforward [Abstract]
Beginning balance	75	75	75
New Issuances		0
Repayments of debt	0	0
Conversion of Debt to Equity		0
Fair Value Adjustments of Debt		0
Other Adjustments	0	0
Ending balance	$ 75	$ 75	$ 75