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Royalty and Commercial Payment Purchase Agreements - Aptevo (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 29, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Jun. 30, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Mar. 31, 2023 | Dec. 31, 2022
Agreements |  |  |  |  |  |  |  |
Long-term royalty and commercial payment receivables |  | $ 74,696 |  |  | $ 74,696 |  |  | $ 63,683
Payments of consideration under RPAs, AAAs and CPPAs |  |  |  |  | 14,650 | $ 8,000 |  |
Contingent consideration under RPAs, AAAs and CPPAs |  | 4,000 |  |  | 4,000 |  |  | 75
Receipts under RPAs, AAAs and CPPAs |  |  |  |  | 8,428 | $ 3,026 |  |
Short-term royalty and commercial payment receivables |  | 0 |  |  | 0 |  |  | $ 2,366
Aptevo |  |  |  |  |  |  |  |
Agreements |  |  |  |  |  |  |  |
Reduction in long-term royalty receivable balance due to receipt of payment |  |  |  |  | 1,144 |  |  |
Aptevo | Commercial Payment Purchase Agreement |  |  |  |  |  |  |  |
Agreements |  |  |  |  |  |  |  |
Maximum milestone payments entitled to receive | $ 5,300 |  |  |  |  |  |  |
Long-term royalty and commercial payment receivables | 9,700 |  |  |  |  |  |  |
Payments of consideration under RPAs, AAAs and CPPAs | 9,600 |  |  |  |  |  |  |
Contingent consideration under RPAs, AAAs and CPPAs | 50 | 0 |  |  | 0 |  | $ 50 |
Commercial payments attributable to net sales threshold | $ 500 |  |  |  |  |  |  |
Short-term royalty and commercial payment receivables |  | 0 |  |  | 0 |  |  |
Amount of allowance for credit losses |  | 0 |  |  | $ 0 |  |  |
Aptevo | Commercial Payment Purchase Agreement | Minimum |  |  |  |  |  |  |  |
Agreements |  |  |  |  |  |  |  |
Receipts under RPAs, AAAs and CPPAs |  |  |  | $ 500 |  |  |  |
Medexus | Commercial Payment Purchase Agreement |  |  |  |  |  |  |  |
Agreements |  |  |  |  |  |  |  |
Receipts under RPAs, AAAs and CPPAs |  | $ 600 | $ 600 |  |  |  |  |

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