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Note 15 - Unaudited Condensed Consolidated Balance Sheet Detail - Accrued Liabilities and Other Current Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Accrued expenses | $ 1,435 | $ 472
Accrued taxes | 62 | 112
Accrued compensation | 4,167 | 2,898
Warranty reserve liability | 5,552 | 212
Deferred revenue, current | 710 | 931
Other | 131 | 130
Total accrued expenses and other current liabilities | $ 12,057 | $ 4,755

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