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Note 3 - Revenues (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Contract with Customer, Liability, Revenue Recognized $ 1.1 $ 1.0 $ 2.8 $ 2.6