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Note 10 - Share-based Compensation - Schedule of Stock-based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Total stock-based compensation $ 803 $ 694 $ 1,582 $ 1,440
Cost of Sales [Member]        
Total stock-based compensation 88 76 167 158
Selling and Marketing Expense [Member]        
Total stock-based compensation 134 146 293 304
General and Administrative Expense [Member]        
Total stock-based compensation 495 418 951 837
Research and Development Expense [Member]        
Total stock-based compensation $ 86 $ 54 $ 171 $ 141