Note 1 - Significant Accounting Policies (Details Textual) Pure in Thousands, $ in Millions	12 Months Ended
	Apr. 29, 2023 USD ($) shares	Apr. 30, 2022 USD ($) shares	May 01, 2021 USD ($) shares
Statement [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Equity Unit Purchase Agreements (in shares) | shares	261,000	276,000	340,000
Self Insurance Reserve and Coverage by Insurance, Noncurrent	$ 5.5	$ 5.9
Self Insurance Reserve, Noncurrent, Covered by Insurance	4.1	4.6
Inventory, Finished Goods, Gross	54.3	58.6
Inventory, Raw Materials, Gross	39.2	44.7
Marketing Expense	44.1	47.6	$ 43.4
Shipping and Handling Costs	$ 86.8	$ 87.7	$ 75.5
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Statement [Line Items]
Number of Major Customers	0
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Statement [Line Items]
Number of Major Customers	0
Building and Building Improvements [Member] | Minimum [Member]
Statement [Line Items]
Property, Plant and Equipment, Useful Life (Year)	5 years
Building and Building Improvements [Member] | Maximum [Member]
Statement [Line Items]
Property, Plant and Equipment, Useful Life (Year)	30 years
Machinery and Equipment [Member] | Minimum [Member]
Statement [Line Items]
Property, Plant and Equipment, Useful Life (Year)	3 years
Machinery and Equipment [Member] | Maximum [Member]
Statement [Line Items]
Property, Plant and Equipment, Useful Life (Year)	15 years