Property and Equipment, net - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 206,101	$ 205,378
Accumulated depreciation	(63,070)	(53,433)
Total property and equipment, net	143,031	151,945
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	3,739	3,739
Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	8,545	8,109
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	41,903	41,411
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	143,260	143,260
Construction Work in Process [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 8,654	$ 8,859