Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
Income taxes (benefit) at statutory federal rate	$ (32,596)	$ (43,673)	$ (71,151)
State and local taxes, net of federal income tax effect	0
Other foreign	(23)
Changes in valuation allowance	37,622	37,471	17,839
Stock compensation	773
Change in fair market value of contingent value right	(6,251)
Limitation on officers' compensation	2,860
Permanent and other items	114	1,865	4,472
Other	10	191	0
Stock based compensation - deferred only	(2,524)
Loss on forward contract valuation		0	17,541
Acquired IPR&D		0	27,340
Loss on CVR revaluation		4,290	3,987
Federal tax credits		(91)	(1)
Effect of tax rate on foreign jurisdiction		(2)	(53)
Provision / (benefit) for income taxes	$ (15)	$ 51	$ (26)
Percent
Income taxes (benefit) at statutory federal rate	21.00%
State and local taxes, net of federal income tax effect	0.00%
Other foreign	0.01%
Changes in valuation allowance	(24.24%)
Stock compensation	(0.50%)
Change in fair market value of contingent value right	4.03%
Limitation on officers' compensation	(1.84%)
Permanent and other items	(0.07%)
Other	(0.01%)
Stock based compensation - deferred only	1.63%
Provision / (benefit) for income taxes	0.01%