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Financial Royalty Assets, net - Schedule of Financial Royalty Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Jan. 31, 2025 | Dec. 31, 2024 | Aug. 31, 2024 | May 29, 2024 | Mar. 31, 2024
--- | --- | --- | --- | --- | --- | ---
Finite-Lived Intangible Assets |  |  |  |  |  |
Gross carrying value | $ 201,618 |  | $ 198,587 |  |  |
Allowance | (3,208) |  | (3,538) |  |  |
Net carrying value | 198,410 |  | 195,049 |  |  |
Financial royalty liability current | 10,100 |  | 10,000 |  |  |
Qarziba |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Gross carrying value | 106,161 |  | 105,329 |  |  |
Allowance | (497) |  | (484) |  |  |
Net carrying value | 105,664 |  | 104,845 |  |  |
Agenus (Bot/Bal) |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Gross carrying value | 40,815 |  | 40,815 |  |  |
Allowance | (408) |  | (408) |  |  |
Net carrying value | 40,407 |  | 40,407 |  | $ 75,000 |
Tolerance Therapeutics (Tzield®) |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Gross carrying value | 25,521 |  | 25,613 |  |  |
Allowance | (99) |  | (101) |  |  |
Net carrying value | 25,422 |  | 25,512 |  |  |
Ensifentrine inventors |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Gross carrying value | 17,790 | $ 1,800 | 15,969 | $ 13,600 |  | $ 3,800
Allowance | (168) |  | (157) |  |  |
Net carrying value | 17,622 |  | 15,812 |  |  |
Elutia (CorMatrix) |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Gross carrying value | 9,870 |  | 9,418 |  |  |
Allowance | (1,895) |  | (2,268) |  |  |
Net carrying value | 7,975 |  | 7,150 |  |  |
InvIOs |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Gross carrying value | 1,286 |  | 1,238 |  |  |
Allowance | (64) |  | (62) |  |  |
Net carrying value | 1,222 |  | 1,176 |  |  |
Selexis |  |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |  |
Gross carrying value | 175 |  | 205 |  |  |
Allowance | (77) |  | (58) |  |  |
Net carrying value | $ 98 |  | $ 147 |  |  |

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