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Fair Value Measurements - Contingent Consideration (Details) - USD ($) |  |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 11, 2024 | Jun. 21, 2023 | Jan. 31, 2024 | Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Fair Value Measurements |  |  |  |  |  |
Contingent consideration under RPAs, AAAs and CPPAs |  |  |  | $ 3,000,000 |  | $ 7,000,000
Payments of consideration under RPAs, AAAs and CPPAs |  |  |  | 15,000,000 | $ 9,600,000 |
LadRx | Assignment and Assumption Agreement and Royalty Purchase Agreement |  |  |  |  |  |
Fair Value Measurements |  |  |  |  |  |
Payments of consideration under RPAs, AAAs and CPPAs | $ 1,000,000.0 | $ 5,000,000.0 | $ 1,000,000.0 | 1,000,000.0 |  |
LadRx | Assignment and Assumption Agreement and Royalty Purchase Agreement | Regulatory milestones |  |  |  |  |  |
Fair Value Measurements |  |  |  |  |  |
Contingent consideration under RPAs, AAAs and CPPAs |  | $ 1,000,000.0 |  | $ 0 |  | $ 1,000,000.0

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- Definition Liability recorded for contingent consideration under purchase agreements. May include royalty purchase agreements, assignment and assumption agreements, and commercial payment purchase agreements. Includes contingent consideration recognized under ASC 815 and measured at fair value as a current liability at the inception of the transaction. Also includes contingent consideration recognized under ASC 450 if it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. + References No definition available. + Details
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- Definition Amount of cash outflow for consideration under agreements, including Royalty Purchase Agreements (RPAs), Assignment and Assumption Agreements (AAAs), Commercial payment purchase agreement (CPPAs) and other agreements classified as investing activities. Payments may include upfront payments, one-time payments, milestone payments and contingent consideration payments. + References No definition available. + Details
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