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Note 9 - Intangible Assets, Net (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Amortization of Intangible Assets $ 0.1 $ 0.1 $ 0.3 $ 0.3
Finite-Lived Intangible Assets, Remaining Amortization Period (Year) 8 years 1 month 6 days   8 years 1 month 6 days