Property and Equipment, net - Component of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 15	$ 18,267
Less: accumulated depreciation	(13)	(9,807)
Property and equipment, net	2	8,460
Office and computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	15	2,183
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	0	1,291
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	0	9,561
Laboratory equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 0	$ 5,232