Deferred Royalty Obligations, Net - Narrative (Details) - USD ($) $ in Thousands			1 Months Ended		3 Months Ended		9 Months Ended
	Jan. 17, 2024	Jun. 30, 2023	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Deferred Royalty Obligations [Line Items]
Fair value of embedded derivative liability					$ 14,341		$ 14,341		$ 21,439
Royalty Interest Purchase and Sale Agreement
Deferred Royalty Obligations [Line Items]
Percentage of royalty payment equal to annual cap		60.00%
Annual net sales		$ 500,000
Percentage of purchase price equal to hard cap		145.00%
Proceeds from royalty obligation under interest purchase and sale agreement			$ 297,000
Royalty obligation debt issuance costs			$ 3,000
Royalty Interest Purchase and Sale Agreement \| Eidos
Deferred Royalty Obligations [Line Items]
Royalty purchase agreement, proceeds from sale		$ 300,000
Funding Agreement
Deferred Royalty Obligations [Line Items]
Funding payment received, net of certain transaction expenses	$ 500,000			$ 500,000
Percentage of royalty interest payments on net sales	5.00%
Royalty interest payments may adjust to maximum rate	10.00%
Royalty interest payments equal to cap amount	$ 950,000
Proceeds from royalty obligation under funding agreement				472,500
Royalty obligation debt discount and issuance costs paid in cash				$ 27,500
Fair value of embedded derivative liability					$ 14,341		$ 14,341		$ 21,439
Royalty agreement, interest rate, effective percentage					22.20%		22.20%		22.20%
Royalty agreement, interest expense					$ 33,700	$ 28,300	$ 98,500	$ 78,200
Royalty agreement, amortization of debt issuance costs and discounts					4,400	3,700	13,000	10,000
Deferred royalty obligation, current					24,600		24,600		$ 8,200
Royalty Purchase Agreement
Deferred Royalty Obligations [Line Items]
Fair value of embedded derivative liability					$ 0		$ 0		$ 0
Royalty agreement, interest rate, effective percentage					11.20%		11.20%		10.40%
Royalty agreement, interest expense					$ 8,600	8,100	$ 25,000	8,300
Royalty agreement, amortization of debt issuance costs and discounts					200	$ 200	600	$ 200
Deferred royalty obligation, current					$ 11,500		$ 11,500		$ 3,000