Property and Equipment, Net - Components of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 3,906	$ 3,945
Less: Accumulated depreciation and amortization	(2,880)	(2,276)
Property and equipment, net	1,026	1,669
Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,636	1,636
Manufacturing Equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,338	1,338
Computer Software and Equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	507	507
Office Furniture and Equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	425	424
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 0	$ 40

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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