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Balance Sheets Components - Schedule of Property and Equipment Net (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 39,231	$ 28,088
Accumulated depreciation	(18,459)	(16,380)
Total property and equipment, net	20,772	11,708
Lab and Manufacturing Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	32,024	21,958
Computer Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,494	1,121
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	292	237
Construction in Progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	638	638
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 4,783	$ 4,134

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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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