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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

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