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Property and Equipment, Net - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 3,466	$ 3,515
Less accumulated depreciation and amortization	(2,844)	(2,811)
Property and equipment, net	622	704
Laboratory equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	630	679
Software and computer equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	407	407
Machinery and equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	450	450
Furniture and fixtures [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	83	83
Vehicles [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	306	306
Leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,590	$ 1,590

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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