Note 5 - Derivative Financial Instruments - Derivatives Instruments Statements of Financial Performance and Financial Position (Details) - USD ($) $ in Thousands	3 Months Ended
	Aug. 01, 2015	Aug. 02, 2014
Recognized in AOCI:
(Loss) gain before income taxes	$ (4,970)	$ 605
Less income tax (benefit) provision	(1,844)	224
Net	(3,126)	381
Reclassified from AOCI to cost of sales:
(Loss) gain before income taxes	(1,391)	15
Less income tax (benefit) provision	(516)	5
Net	(875)	10
Net change to AOCI	$ (2,251)	$ 371