Property and Equipment. net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 7,686	$ 4,610
Accumulated depreciation	(2,210)	(1,279)
Property and equipment, net	5,476	3,331
Manufacturing Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	3,555	2,190
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,467	932
Computer Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	351	296
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	402	259
Computer Hardware
Property Plant And Equipment [Line Items]
Property and equipment, gross	909	527
Assets In Progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 1,002	$ 406

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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