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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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