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Related Party Transactions (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Related Party Transactions |  |  |  |
Research and development | $ 100,814,000 | $ 184,367,000 | $ 204,641,000 | $ 371,951,000
Yale University | Related Party |  |  |  |
Related Party Transactions |  |  |  |
Research and development | 716,000 | $ 330,000 | 1,491,000 | $ 851,000
Due to related party | $ 0 |  | $ 0 |

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