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

Amount of liabilities classified as other.

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