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Royalty and Commercial Payment Purchase Agreements - LadRx (Details) - USD ($) $ in Thousands |  | 6 Months Ended |
--- | --- | --- | ---
Jun. 21, 2023 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Agreements |  |  |  |
Payments of consideration under RPAs, AAAs and CPPAs |  | $ 14,650 | $ 5,000 |
Contingent consideration under RPAs, AAAs and CPPAs |  | 1,000 |  | $ 75
Long-term royalty and commercial payment receivables |  | 72,232 |  | $ 63,683
Assignment and Assumption Agreement and Royalty Purchase Agreement |  |  |  |
Agreements |  |  |  |
Long-term royalty and commercial payment receivables | $ 6,000 |  |  |
LadRx |  |  |  |
Agreements |  |  |  |
Contingent consideration under RPAs, AAAs and CPPAs | 1,000 |  |  |
LadRx | Assignment and Assumption Agreement and Royalty Purchase Agreement |  |  |  |
Agreements |  |  |  |
Payments of consideration under RPAs, AAAs and CPPAs | 5,000 |  |  |
Maximum payments based on achievement of regulatory and commercial sales milestones | 6,000 |  |  |
Maximum payable on regulatory milestone | 5,000 |  |  |
Maximum payable on commercial sales milestone | 1,000 |  |  |
Amount of allowance for credit losses |  | $ 0 |  |
LadRx | Assignment and Assumption Agreement and Royalty Purchase Agreement | Regulatory milestones |  |  |  |
Agreements |  |  |  |
Contingent consideration under RPAs, AAAs and CPPAs | 1,000 |  |  |
LadRx | Assignment and Assumption Agreement | Arimoclomol |  |  |  |
Agreements |  |  |  |
Maximum regulatory and commercial milestone payments, net | 52,500 |  |  |
Maximum payment obligations based on a portion of regulatory and commercial milestone payments | 9,500 |  |  |
LadRx | Royalty Purchase Agreement |  |  |  |
Agreements |  |  |  |
Contingent consideration under RPAs, AAAs and CPPAs | 1,000 |  |  |
LadRx | Royalty Purchase Agreement | Aldoxorubicin |  |  |  |
Agreements |  |  |  |
Maximum regulatory and commercial milestones | $ 342,700 |  |  |

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