Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred tax assets:
Federal and state operating loss carryforwards	$ 211,531	$ 203,889
Royalty Purchase Agreement	72,600	71,860
Disallowed interest	39,839	41,429
Capitalized research and development	26,126	37,848
Equity compensation	26,685	26,062
Accrued variable consideration	19,684	12,483
R&D tax credits, net of reserves	18,887	18,887
Other temporary differences	2,499	2,148
Total deferred tax assets	417,851	414,606
Deferred tax liabilities:
Other temporary differences	(787)	(1,521)
Total deferred tax liabilities	(787)	(1,521)
Valuation allowance	(417,064)	(413,085)
Net deferred tax assets	$ 0	$ 0