Borrowings - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Principal Outstanding
Total borrowings	$ 939,476	$ 395,535
Less: current portion	372	2,014
Total borrowings, non-current	939,104	393,521
Carrying Value
Total borrowings	813,266	316,896
Less: current portion	372	2,014
Total borrowings, non-current	812,894	314,882
Notes payable - related party
Principal Outstanding
Total borrowings	194,419	324,763
Carrying Value
Total borrowings	150,427	249,059
2021 Convertible Notes Payable \| Convertible Notes
Principal Outstanding
Total borrowings	0	122,868
Carrying Value
Total borrowings	0	109,838
AFG Convertible Note \| Convertible Notes
Principal Outstanding
Total borrowings	0	22,353
Carrying Value
Total borrowings	0	63,033
Delayed Draw Term Loan (DDTL) \| Secured Debt
Principal Outstanding
Total borrowings	194,419	179,542
Carrying Value
Total borrowings	150,427	76,188
Equipment Financing Facility
Carrying Value
Total borrowings	372	2,385
Equipment Financing Facility \| Line of Credit
Principal Outstanding
Total borrowings	372	2,386
Carrying Value
Total borrowings	372	2,385
May 2025 Convertible Notes
Carrying Value
Total borrowings	0	0
May 2025 Convertible Notes \| Secured Debt
Principal Outstanding
Total borrowings	50,000	0
Carrying Value
Total borrowings	48,044	0
November 2025 Convertible Notes \| Secured Debt
Principal Outstanding
Total borrowings	600,000	0
Carrying Value
Total borrowings	530,096	0
DOE Loan Facility
Carrying Value
Total borrowings	84,327	65,452
DOE Loan Facility \| Line of Credit
Principal Outstanding
Total borrowings	94,685	68,386
Carrying Value
Total borrowings	$ 84,327	$ 65,452

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