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Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 6,145	$ 5,922
Less accumulated depreciation	(3,676)	(3,545)
Property and equipment, net	2,469	2,377
Computers and Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	607	596
Furniture, Fixtures, and Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	400	400
Manufacturing and Testing Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	4,184	3,874
Construction in Process
Property Plant And Equipment [Line Items]
Property and equipment, gross	22	120
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 932	$ 932

X

- 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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