Financial Royalty Assets, net (formerly known as Commercial License Rights) - Schedule of Financial Royalty Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross carrying value(2)	$ 73,363	$ 70,364
Allowance	(5,053)	(8,073)
Net carrying value	68,310	62,291
Elutia (CorMatrix)
Finite-Lived Intangible Assets [Line Items]
Gross carrying value(2)	12,680	13,304
Allowance	(4,458)	(7,490)
Net carrying value	8,222	5,814
Selexis
Finite-Lived Intangible Assets [Line Items]
Gross carrying value(2)	736	940
Allowance	(64)	(179)
Net carrying value	672	761
Ovid (Soticlestat)
Finite-Lived Intangible Assets [Line Items]
Gross carrying value(2)	30,310	30,310
Allowance	(303)	(303)
Net carrying value	30,007	30,007
Tolerance Therapeutics (TZIELD)
Finite-Lived Intangible Assets [Line Items]
Gross carrying value(2)	25,810	25,810
Allowance	(101)	(101)
Net carrying value	25,709	25,709
Ensifentrine inventors
Finite-Lived Intangible Assets [Line Items]
Gross carrying value(2)	3,827	0
Allowance	(127)	0
Net carrying value	3,700	$ 0
Elutia
Finite-Lived Intangible Assets [Line Items]
Net carrying value	$ 2,600