Supplementary Balance Sheet Information - Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 10,967	$ 10,928
Less: accumulated depreciation	(7,017)	(6,749)
Total property and equipment, net	3,950	4,179
Lab Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	6,725	6,784
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	2,365	2,339
Computer Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	703	700
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	341	391
Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	325	600
Vehicles
Property Plant And Equipment [Line Items]
Property and equipment, gross	97	97
Construction in Process
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 411	$ 17

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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