Note 3 - Leases (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
Operating Lease, Cost	$ 4.1	$ 4.0	$ 8.3	$ 7.7
Operating Lease, Weighted Average Remaining Lease Term (Year)	4 years 6 months 25 days		4 years 6 months 25 days		4 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.43%		4.43%		4.30%
Operating Lease, Payments	$ 4.3	$ 4.1	$ 8.4	$ 7.8