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Note 15 - Segments and Geographic Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Long-lived assets $ 3,046 $ 2,916
UNITED STATES    
Long-lived assets 2,818 2,851
Asia Pacific [Member]    
Long-lived assets 64 24
CANADA    
Long-lived assets 142 28
Latin America [Member]    
Long-lived assets 5
Europe [Member]    
Long-lived assets $ 22 $ 8