Note 5 - Derivative Financial Instruments - Derivatives Instruments, Statements of Financial Performance and Financial Position (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 28, 2023	Jan. 29, 2022	Jan. 28, 2023	Jan. 29, 2022
Gain (loss) before income taxes	$ 10,918	$ 11,007	$ (14,419)	$ 11,980
Less income tax provision	2,612	2,633	(3,449)	2,866
Net	8,306	8,374	(10,970)	9,114
(Loss) gain before income taxes	(2,036)	512	(5,750)	5,052
Less income tax (benefit) provision	(486)	122	(1,374)	1,209
Net	(1,550)	390	(4,376)	3,843
Net change to AOCI	$ 9,856	$ 7,984	$ (6,594)	$ 5,271