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Note 11 - Other Current Liabilities - Other Current Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Accrued warranty | $ 531 | $ 235
Accrued taxes | 113 | 67
Accrued restructuring | 70 | 340
Other | 374 | 162
Total other current liabilities | 1,267 | 804
Z-Sciences [Member] |  |
Contingent consideration – Z-Sciences acquisition | $ 179 | $ 0

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