Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Property and equipment
Gross property and equipment	$ 9,576		$ 9,589
Accumulated Depreciation	(7,199)		(7,103)
Property and Equipment, net	2,377		2,486
Depreciation expense	100	$ 200
Leasehold Improvements
Property and equipment
Gross property and equipment	1,204		1,204
Machinery and Equipment
Property and equipment
Gross property and equipment	5,867		5,864
Information Technology & Office Equipment
Property and equipment
Gross property and equipment	1,845		1,845
Laboratory Equipment
Property and equipment
Gross property and equipment	$ 660		$ 676

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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