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Note 7 - Accounts Payable and Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Patent and legal costs $ 103 $ 135
Accrued compensation 777 1,100
Warranty costs 75 125
Pre-funding of the sale of shares, preferred stock and warrants 7,350 0
Taxes and other 257 103
Total $ 8,562 $ 1,463