Balance Sheet Items - Summary of Accrued expenses and other current liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Accrued license agreement upfront payment	$ 55,000	$ 0
Accrued research and development expenses	18,332	12,643
Accrued payroll related expenses	6,601	9,165
Accrued professional service expenses	4,007	3,675
Other	3,132	1,041
Total accrued expenses and other current liabilities	$ 87,072	$ 26,524