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Kolltan Acquisition (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 15, 2022 | Nov. 29, 2016 | Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Kolltan Acquisition |  |  |  |  |
Litigation settlement related loss |  |  |  | $ (12,500) | $ (15,000)
Kolltan |  |  |  |  |
Kolltan Acquisition |  |  |  |  |
Shares issued as part of consideration (in shares) |  | 1,217,200 |  |  |
Execution of the settlement agreement | $ 15,000 |  |  |  |
Milestone payments made in cash upon Successful Completion of a Phase 2 Clinical Trial | 12,500 |  | $ 12,500 |  |
Milestone payment payable upon regulatory approval of a Surviving Company Product | 52,500 |  |  |  |
Obligation to make applicable milestone payment |  |  | 12,500 | $ 12,500 |
Litigation settlement related loss |  |  | $ 12,500 |  |
Kolltan | Specified development, regulatory approvals or sales-based milestones |  |  |  |  |
Kolltan Acquisition |  |  |  |  |
Potential milestone payments |  | $ 172,500 |  |  |
Milestone payment payable upon regulatory approval of a Surviving Company Product | $ 172,500 |  |  |  |

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