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Note 1 - Significant Accounting Policies (Details Textual)
$ in Millions
12 Months Ended
May 03, 2025
USD ($)
shares
Apr. 27, 2024
USD ($)
shares
Apr. 29, 2023
USD ($)
shares
Apr. 30, 2022
USD ($)
Number of Reportable Segments 1      
Money Market Funds, at Carrying Value $ 109.1 $ 240.9    
Accounts Receivable, after Allowance for Credit Loss     $ 104.9 $ 93.6
Inventory, Finished Goods, Gross 44.0 50.3    
Inventory, Raw Materials, Gross 41.1 34.3    
Self Insurance Reserve and Coverage by Insurance, Noncurrent 5.5 5.5    
Self Insurance Reserve, Noncurrent, Covered by Insurance 3.8 4.0    
Shipping and Handling Costs 75.5 77.8 86.8  
Marketing Expense $ 45.3 $ 50.0 $ 44.1  
Incremental Common Shares Attributable to Dilutive Effect of Equity Unit Purchase Agreements (in shares) | shares 78,000 201,000 261,000  
Building and Building Improvements [Member] | Minimum [Member]        
Property, Plant and Equipment, Useful Life (Year) 2 years      
Building and Building Improvements [Member] | Maximum [Member]        
Property, Plant and Equipment, Useful Life (Year) 30 years      
Machinery and Equipment [Member] | Minimum [Member]        
Property, Plant and Equipment, Useful Life (Year) 3 years      
Machinery and Equipment [Member] | Maximum [Member]        
Property, Plant and Equipment, Useful Life (Year) 15 years