Property and Equipment, net - Summary 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	$ 542	$ 457
Less accumulated depreciation and amortization	(298)	(216)
Property and Equipment, Net	244	241
Lab Equipment
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	30	30
Computer and Office Equipment
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	154	149
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	78	61
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	188	188
Construction In Progress
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	$ 92	$ 29