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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Related Party Transaction [Line Items] |  |  |
Research and development expense | $ 58,574 | $ 30,139 |
Prepaid expenses | 2,074 |  | $ 2,339
Altasciences Company Inc [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Accounts payable | $ 500 |  | $ 400
Other Liability, Related Party [Extensible Enumeration] | Accounts Payable, Current |  | Accounts Payable, Current
Research and development expense | $ 200 | $ 600 |
Prepaid expenses | $ 200 |  | $ 200

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