Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Debt and Other Financing Arrangements (Details Textual)

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Note 6 - Debt and Other Financing Arrangements (Details Textual) - Credit Agreement [Member] - USD ($)
$ in Millions
Aug. 01, 2018
Mar. 31, 2020
Long-term Debt, Total   $ 420.1
Term Loan [Member]    
Debt Instrument, Face Amount $ 250.0  
Revolving Credit Facility [Member]    
Line of Credit Facility, Maximum Borrowing Capacity 600.0  
Line of Credit Facility, Additional Borrowing Capacity $ 200.0  
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.20%