Note 1 - Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 27, 2024	Apr. 29, 2023	Apr. 30, 2022
Balance at beginning of year	$ 523	$ 559	$ 1,140
Net charge (credit) to expense	427	11	(581)
Net charge-off	(82)	(47)	0
Balance at end of year	$ 868	$ 523	$ 559