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Note 7 - Accounts Payable and Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Patent and legal costs $ 68 $ 28
Accrued compensation 710 628
Warranty costs 78 96
Taxes and other 56 72
Accrued Liabilities, Current, Total $ 912 $ 824