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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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