Note 1 - Significant Accounting Policies (Details Textual) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jan. 31, 2026	Jan. 25, 2025	Jan. 31, 2026	Jan. 25, 2025	May 03, 2025	Apr. 27, 2024
Money Market Funds, at Carrying Value	$ 166.4		$ 166.4		$ 109.1
Accounts Receivable, Allowance for Credit Loss	1.2		1.2		1.2
Accounts Receivable, after Allowance for Credit Loss	90.9		90.9			$ 102.8
Inventory, Finished Goods, Gross	58.5		58.5		44.0
Inventory, Raw Materials, Gross	37.6		37.6		$ 41.1
Shipping and Handling Costs	17.8	$ 17.5	55.9	$ 55.5
Marketing Expense	$ 10.0	$ 10.1	$ 34.6	$ 33.2
Incremental Common Shares Attributable to Dilutive Effect of Equity Unit Purchase Agreements (in shares)	33,000	74,000	57,000	82,000

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

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Amount of allowance for credit loss on accounts receivable.

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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.

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

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

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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.

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Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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