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Acquisitions, Licensing and Other Arrangements - Alexion (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Dec. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Acquisitions, Licensing and Other Arrangements |  |  |
Revenue from contracts with customers |  | $ 4,000 | $ 1,000
License Agreement | Alexion |  |  |
Acquisitions, Licensing and Other Arrangements |  |  |
Maximum milestone payments entitled to receive | $ 10,500 |  |
Contract assets | 0 | 0 |
Contract liabilities | 0 | 0 |
Capitalized contract costs | 0 | 0 |
Revenue from contracts with customers | $ 500 | $ 0 |

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