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Note 7 - Share-based Compensation - Share-based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Share-based compensation expense $ 1,232 $ 1,162 $ 3,924 $ 3,836
Cost of Sales [Member]        
Share-based compensation expense 325 387 906 1,102
Selling, General and Administrative Expenses [Member]        
Share-based compensation expense $ 907 $ 775 $ 3,018 $ 2,734