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Fixed Assets and Operating Leases - Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fixed Assets and Operating Leases
Machinery and equipment	$ 722	$ 720
Office furniture and equipment	218	180
Leasehold improvements	192	149
Fixed assets, gross	1,132	1,049
Less: Accumulated depreciation and amortization	(1,055)	(1,017)
Construction in progress		11
Fixed assets, net, after accumulated amortization	77	43
Operating lease ROU assets	453	384
Property, Plant and Equipment, Net, Total	$ 530	$ 427

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Net amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount, after accumulated depreciation and excluding construction in progress and lessor's underlying asset for which right to use has been conveyed to lessee under operating lease, of physical asset used in normal conduct of business to create and distribute product and service.

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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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