Borrowings - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Debt Instrument
Amortization of debt discount	$ 181	$ 0
2021 Convertible Notes Payable \| Convertible Notes
Debt Instrument
Contractual interest expense	3,072	7,053
Amortization of debt discount	3,230	6,608
Amortization of debt issuance costs	311	638
Total	6,613	14,299
AFG Convertible Note \| Convertible Notes \| Related Party
Debt Instrument
Contractual interest expense	3,300	4,924
Amortization of debt discount	108	928
Amortization of debt issuance costs	(95)
Amortization of debt issuance costs		262
Total	3,313	6,114
2025 Convertible Notes Due \| Convertible Notes
Debt Instrument
Contractual interest expense	8,353
Amortization of debt discount	853
Amortization of debt issuance costs	75
Total	9,281
November 2025 Convertible Notes \| Convertible Notes
Debt Instrument
Contractual interest expense	1,050
Amortization of debt discount	3,257
Amortization of debt issuance costs	4
Total	4,311
DOE Loan Facility \| Line of Credit
Debt Instrument
Contractual interest expense	3,826	107
Amortization of debt issuance costs	1,760	9
Total	$ 5,767	116
Senior Secured Term Loan \| Secured Debt \| Nonrelated Party
Debt Instrument
Contractual interest expense		6,858
Amortization of debt discount		224
Amortization of debt issuance costs		1,980
Total		$ 9,062

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