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Note 16 - Income Taxes - Loss Before Provision for Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
United States $ (9,652) $ (6,541) $ (7,400)
International
Loss before provision for income taxes $ (9,652) $ (6,541) $ (7,400)