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Fair Value Measurements - Contingent Consideration (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2023 | Jun. 21, 2023 | Dec. 31, 2022 | Feb. 25, 2019
Fair Value Measurements |  |  |  |  |
Changes in estimated fair value of contingent consideration |  | $ 75 |  |  |
Contingent consideration under RPAs, AAAs and CPPAs | $ 4,000 | 4,000 |  | $ 75 |
Bioasis | Royalty Purchase Agreement |  |  |  |  |
Fair Value Measurements |  |  |  |  |
Contingent consideration under RPAs, AAAs and CPPAs | 0 | $ 0 |  | $ 75 | $ 75
LadRx | Royalty Purchase Agreement |  |  |  |  |
Fair Value Measurements |  |  |  |  |
Changes in estimated fair value of contingent consideration | $ 0 |  |  |  |
Contingent consideration under RPAs, AAAs and CPPAs |  |  | $ 1,000 |  |

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