Fair Value Measurements - Schedule of Changes In Estimated Fair Values of Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
PIPE Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 110,881
Fair value remeasurement	(45,276)
Ending balance	65,605
NRA Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	47,465
Fair value remeasurement	(19,382)
Ending balance	28,083
Second Lien Loans
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	10,872
Fair value remeasurement	474
Ending balance	$ 11,346
SAFE
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		$ 59,301
Issuance during the year		21,660
Fair value remeasurement		108,375
Ending balance		189,336
Redeemable convertible preferred stock warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		1,619
Issuance during the year		0
Fair value remeasurement		115
Ending balance		$ 1,734