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Note 10 - Share-based Compensation - Schedule of Stock-based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Total stock-based compensation $ 797 $ 687 $ 2,593 $ 2,269
Cost of Sales [Member]        
Total stock-based compensation 91 68 291 237
Selling and Marketing Expense [Member]        
Total stock-based compensation 124 103 412 397
General and Administrative Expense [Member]        
Total stock-based compensation 499 451 1,617 1,400
Research and Development Expense [Member]        
Total stock-based compensation $ 83 $ 65 $ 273 $ 235