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Note 10 - Common Stock and Stock-based Compensation Plans - Equity-based Compensation Expense Included in Interim Condensed Consolidated Statements of Income (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Total equity-based compensation expense $ 3,389 $ 3,198
Cost of Revenues [Member]    
Total equity-based compensation expense 339 143
Research and Development, Net [Member]    
Total equity-based compensation expense 1,995 1,685
Sales and Marketing [Member]    
Total equity-based compensation expense 333 418
General and Administrative [Member]    
Total equity-based compensation expense $ 722 $ 952