Note 7 - Derivative Financial Instruments - Derivatives Instruments, Statements of Financial Performance and Financial Position (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	May 01, 2021	May 02, 2020
Gain (loss) before income taxes	$ 15,105	$ 12,973	$ (9,613)
Less income tax provision (benefit)	3,613	3,103	(2,299)
Net	11,492	9,870	(7,314)
Gain (loss) before income taxes	10,001	2,550	(4,786)
Less income tax provision (benefit)	2,391	610	(1,145)
Net	7,610	1,940	(3,641)
Net change to AOCI	$ 3,882	$ 7,930	$ (3,673)