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Balance Sheet Components - Summary of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 3,088	$ 2,658
Less: Accumulated depreciation	(1,374)	(1,204)
Property and equipment, net	1,714	1,454
Tools and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,874	1,685
Computer Equipment and Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	100	100
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	254	254
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	34	29
Construction In Process
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 826	$ 590

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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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