Note 4 - Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
Apr. 27, 2024	Apr. 29, 2023	Apr. 30, 2022
Operating Lease, Cost	$ 15.9	$ 14.4	$ 14.5
Operating Lease, Weighted Average Remaining Lease Term (Year)	4 years 9 months 18 days	4 years 4 months 2 days
Operating Lease, Weighted Average Discount Rate, Percent	4.30%	3.30%
Operating Lease, Payments	$ 15.4	$ 14.3	$ 14.7

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

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- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

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-URI https://asc.fasb.org/1943274/2147479589/842-20-55-53

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- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
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-Section 55
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-Publisher FASB
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