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Fixed Assets - Summary (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 1,082	$ 1,132
Accumulated depreciation and amortization	(1,006)	(1,055)
Fixed assets, net, after accumulated amortization	76	77
Operating lease ROU assets, net	417	453
Total	493	530
Machinery and equipment
Property, Plant and Equipment [Line Items]
Machinery and equipment	666	722
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Office furniture and equipment	224	218
Leasehold improvements
Property, Plant and Equipment [Line Items]
Leasehold improvements	$ 192	$ 192

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Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from operating lease, excluding construction in progress.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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