Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands		Jun. 30, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Clinical and development costs		$ 1,132	$ 1,404
Manufacturing and quality costs		30,448	31,917
Payroll and payroll-related costs		7,437	16,465
Collaboration payable - related party (Note 17)		43,075	28,053
Facility and other		4,264	2,772
Total accrued expenses and other current liabilities	[1]	$ 86,356	$ 80,611

[1] Includes related party amounts of $43,075 and $28,053 at June 30, 2024 and December 31, 2023, respectively (see Note 17, Related Party Transactions).