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Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Property and equipment, at cost	$ 3,080	$ 2,714
Less: accumulated depreciation	(1,134)	(739)
Property and equipment, net	1,946	1,975
Manufacturing and Laboratory Equipment
Property Plant And Equipment [Line Items]
Property and equipment, at cost	2,179	1,863
Computer Hardware
Property Plant And Equipment [Line Items]
Property and equipment, at cost	28	28
Office Furniture and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, at cost	28	28
Leasehold Improvement
Property Plant And Equipment [Line Items]
Property and equipment, at cost	234
Construction in Progress
Property Plant And Equipment [Line Items]
Property and equipment, at cost	$ 611	$ 795

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- Definition

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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