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Note 7 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Accrued salaries and other compensation $ 882 $ 1,072
Sales and marketing programs 537 435
Product warranty 194 245
Other accrued liabilities 383 91
Total $ 1,996 $ 1,843