Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 4,872	$ 4,223
Less accumulated depreciation and amortization	(3,227)	(2,567)
Total property and equipment, net	1,645	1,656
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	4,139	3,848
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	103	199
Computer Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	73	103
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	199	$ 73
Construction-In-Progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 358

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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