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Note 2 - Foreign Exchange Rates (Details Textual)
$ in Millions
3 Months Ended
Mar. 31, 2024
USD ($)
Mar. 31, 2023
Dec. 31, 2023
USD ($)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax $ 41.8   $ 34.6
Foreign Exchange Forward [Member]      
Derivative, Number of Instruments Held 0   52
Derivative, Notional Amount     $ 2.9
Currency Concentration Risk [Member] | Revenue Benchmark [Member] | Other Currency [Member]      
Concentration Risk, Percentage 21.50% 18.50%