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Note 4 - Revenue Recognition (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2022
Sep. 30, 2022
Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total   $ 17.8
Contract with Customer, Liability, Total $ 121.1 $ 108.9
Contract with Customer, Liability, Revenue Recognized $ 78.1