Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Accrued Liabilities, Current [Abstract]
Payroll and employee-related costs	$ 14,373	$ 17,347
Research costs	19,182	16,962
Collaboration costs	51,455	2,395
Licensing fees	2,325	3,143
Professional fees	2,661	2,515
Intellectual property costs	1,379	1,642
Accrued property and equipment	0	630
Other	508	701
Total	$ 91,883	$ 45,335