Note 1 - Significant Accounting Policies (Details Textual) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Oct. 26, 2024	Oct. 28, 2023	Oct. 26, 2024	Oct. 28, 2023	Apr. 27, 2024
Accounts Receivable, Allowance for Credit Loss	$ 1.0		$ 1.0		$ 0.9
Inventory, Finished Goods, Gross	49.0		49.0		50.3
Inventory, Raw Materials, Gross	42.1		42.1		$ 34.3
Shipping and Handling Costs	18.4	$ 19.7	38.0	$ 40.6
Marketing Expense	$ 11.6	$ 13.3	$ 23.1	$ 24.1
Incremental Common Shares Attributable to Dilutive Effect of Equity Unit Purchase Agreements (in shares)	73,000	244,000	86,000	250,000

Cost incurred during the reporting period in transporting goods and services to customers.

No definition available.

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- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
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- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of equity unit purchase agreements using the treasury stock method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
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- Definition

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
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- Definition

Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
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- Definition

Expenditures for planning and executing the conception, pricing, promotion, and distribution of ideas, goods, and services. Costs of public relations and corporate promotions are typically considered to be marketing costs.

+ References

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