Financial Royalty Assets, net - Schedule of Financial Royalty Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Intangible Asset, Finite-Lived
Gross carrying value	$ 809,240	$ 222,375
Allowance	(9,126)	(2,706)
Net carrying value	800,114	219,669
Ojemda
Intangible Asset, Finite-Lived
Gross carrying value	240,804	0
Allowance	(1,175)	0
Net carrying value	239,629	0
Vabysmo
Intangible Asset, Finite-Lived
Gross carrying value	132,937	0
Allowance	(630)	0
Net carrying value	132,307	0
Qarziba
Intangible Asset, Finite-Lived
Gross carrying value	98,845	118,593
Allowance	(445)	(498)
Net carrying value	98,400	118,095
Agenus Bot/Bal
Intangible Asset, Finite-Lived
Gross carrying value	40,815	40,815
Allowance	(408)	(408)
Net carrying value	40,407	40,407
Miplyffa
Intangible Asset, Finite-Lived
Gross carrying value	40,164	0
Allowance	(775)	0
Net carrying value	39,389	0
Volixibat
Intangible Asset, Finite-Lived
Gross carrying value	38,400	0
Allowance	(384)	0
Net carrying value	38,016	0
Osavampator
Intangible Asset, Finite-Lived
Gross carrying value	30,800	0
Allowance	(308)	0
Net carrying value	30,492	0
REC-4881
Intangible Asset, Finite-Lived
Gross carrying value	30,700	0
Allowance	(307)	0
Net carrying value	30,393	0
Tolerance Therapeutics (Tzield®)
Intangible Asset, Finite-Lived
Gross carrying value	25,919	25,257
Allowance	(101)	(98)
Net carrying value	25,818	25,159
Ryjunea
Intangible Asset, Finite-Lived
Gross carrying value	22,990	0
Allowance	(230)	0
Net carrying value	22,760	0
Ohtuvayre inventors
Intangible Asset, Finite-Lived
Gross carrying value	21,160	16,921
Allowance	(193)	(151)
Net carrying value	20,967	16,770
Twist programs
Intangible Asset, Finite-Lived
Gross carrying value	20,500	0
Allowance	(1,435)	0
Net carrying value	19,065	0
Oak Hill programs
Intangible Asset, Finite-Lived
Gross carrying value	10,900	0
Allowance	(545)	0
Net carrying value	10,355	0
Primrose
Intangible Asset, Finite-Lived
Gross carrying value	6,900	3,281
Allowance	(207)	(98)
Net carrying value	6,693	3,183
Vidutolimod
Intangible Asset, Finite-Lived
Gross carrying value	6,300	0
Allowance	(31)	0
Net carrying value	6,269	0
D-Fi
Intangible Asset, Finite-Lived
Gross carrying value	6,000	0
Allowance	(300)	0
Net carrying value	5,700	0
Ixinity
Intangible Asset, Finite-Lived
Gross carrying value	5,629	0
Allowance	(103)	0
Net carrying value	5,526	0
AT220
Intangible Asset, Finite-Lived
Gross carrying value	3,990	5,132
Allowance	(107)	(132)
Net carrying value	3,883	5,000
Elutia (CorMatrix)
Intangible Asset, Finite-Lived
Gross carrying value	4,071	6,607
Allowance	(496)	(1,107)
Net carrying value	3,575	5,500
Others
Intangible Asset, Finite-Lived
Gross carrying value	21,416	5,769
Allowance	(946)	(214)
Net carrying value	$ 20,470	$ 5,555