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Note 1 - Significant Accounting Policies and Recently Adopted Accounting Pronouncement (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Oct. 31, 2020
Oct. 26, 2019
Oct. 31, 2020
Oct. 26, 2019
May 02, 2020
Inventory, Finished Goods, Gross, Total $ 41.7   $ 41.7   $ 39.1
Inventory, Raw Materials, Gross, Total 27.1   27.1   $ 24.4
Marketing Expense 10.0 $ 13.6 19.9 $ 28.7  
Shipping and Handling Costs $ 18.5 $ 18.3 $ 37.9 $ 36.4