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Note 13 - Capital Stock - Stock-based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation $ 3,034 $ 3,044
Discontinued Operations [Member]    
Share-based Compensation 150
Cost of Sales [Member] | Continuing Operations [Member]    
Share-based Compensation 43 64
Selling and Marketing Expense [Member] | Continuing Operations [Member]    
Share-based Compensation 119 431
General and Administrative Expense [Member] | Continuing Operations [Member]    
Share-based Compensation 2,710 2,232
Research and Development Expense [Member] | Continuing Operations [Member]    
Share-based Compensation $ 162 $ 167