Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Revenue Recognition (Details Textual)

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Note 4 - Revenue Recognition (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2020
Dec. 31, 2020
Jun. 30, 2020
Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total $ 14.6 $ 14.6  
Contract with Customer, Liability, Total 90.0 90.0 $ 62.6
Contract with Customer, Liability, Revenue Recognized $ 12.0 $ 57.9