Note 6 - Derivative Financial Instruments - Derivatives Instruments Statements of Financial Performance and Financial Position (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2016	May 02, 2015	May 03, 2014
Recognized in AOCI-
Loss before income taxes	$ (5,743)	$ (3,488)	$ (1,059)
Less income tax benefit	(2,131)	(1,294)	(393)
Net	(3,612)	(2,194)	(666)
Reclassified from AOCI to cost of sales-
(Loss) gain before income taxes	(6,987)	248	(2,028)
Less income tax (benefit) provision	(2,592)	92	(752)
Net	(4,395)	156	(1,276)
Net change to AOCI	$ 783	$ (2,350)	$ 610