Financial Royalty Assets, net - Schedule of Financial Royalty Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Intangible Asset, Finite-Lived
Gross carrying value	$ 209,699	$ 222,375
Allowance	(2,489)	(2,706)
Net carrying value	207,210	219,669
Short-term portion of financial royalty assets, net	12,982	22,792
Qarziba
Intangible Asset, Finite-Lived
Gross carrying value	101,303	118,593
Allowance	(468)	(498)
Net carrying value	100,835	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
Tolerance Therapeutics (Tzield®)
Intangible Asset, Finite-Lived
Gross carrying value	25,470	25,257
Allowance	(99)	(98)
Net carrying value	25,371	25,159
Ohtuvayre inventors
Intangible Asset, Finite-Lived
Gross carrying value	19,957	16,921
Allowance	(179)	(151)
Net carrying value	19,778	16,770
Elutia (CorMatrix)
Intangible Asset, Finite-Lived
Gross carrying value	6,062	6,607
Allowance	(837)	(1,107)
Net carrying value	5,225	5,500
AT220
Intangible Asset, Finite-Lived
Gross carrying value	4,442	5,132
Allowance	(109)	(132)
Net carrying value	4,333	5,000
Primrose mRNA
Intangible Asset, Finite-Lived
Gross carrying value	3,281	3,281
Allowance	(98)	(98)
Net carrying value	3,183	3,183
Others
Intangible Asset, Finite-Lived
Gross carrying value	5,729	5,769
Allowance	(212)	(214)
Net carrying value	5,517	5,555
Zerion
Intangible Asset, Finite-Lived
Gross carrying value	2,640	0
Allowance	(79)	0
Net carrying value	$ 2,561	$ 0