Property and Equipment - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 272	$ 172
Less: accumulated depreciation	(77)	(30)
Property, Plant and Equipment, Net, Total	195	142
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	231	131
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 41	$ 41