Note 4 - Leases (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Apr. 29, 2023	Apr. 30, 2022	May 01, 2021
Statement [Line Items]
Operating Lease, Cost	$ 14.4	$ 14.5	$ 14.6
Operating Lease, Weighted Average Remaining Lease Term (Year)	4 years 4 months 2 days	4 years
Operating Lease, Weighted Average Discount Rate, Percent	3.30%	3.08%
Operating Lease, Payments	$ 14.3	$ 14.7	$ 14.1