Finance Receivables - Schedule of Nonaccrual and Performing Finance Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	$ 253,136	$ 289,009
Allowance for credit losses	(7,740)	(11,249)	$ (14,343)	$ (13,901)
Total carrying value	245,396	277,760
Term loans
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	241,634	224,073
Allowance for credit losses	(6,015)	(7,158)	(9,598)	(9,731)
Royalty purchases
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	11,502	64,936
Allowance for credit losses	(1,725)	(4,091)	$ (4,745)	$ (4,170)
Nonaccrual
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	11,502	14,830
Allowance for credit losses	(1,725)	(2,075)
Total carrying value	9,777	12,755
Nonaccrual | Term loans
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	0	1,000
Nonaccrual | Royalty purchases
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	11,502	13,830
Performing
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	241,634	274,179
Allowance for credit losses	(6,015)	(9,174)
Total carrying value	235,619	265,005
Performing | Term loans
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	241,634	223,073
Performing | Royalty purchases
Financing Receivable, Nonaccrual [Line Items]
Total before allowance for credit losses	$ 0	$ 51,106