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Note 5 - Balance Sheet Information (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Proceeds from Employee Retention Credit Refund     $ 2,200 $ 3,200
Employee retention credit fees (see Note 5) $ 170 $ 0 $ 341 $ 472