Note 6 - Derivatives Instruments Statements of Financial Performance and Financial Position (Details) - USD ($) $ in Thousands	12 Months Ended
	May. 02, 2015	May. 03, 2014	Apr. 27, 2013
Recognized in AOCI-
Loss before income taxes	$ (3,488)	$ (1,059)	$ (2,521)
Less income tax benefit	(1,294)	(393)	(935)
Net	(2,194)	(666)	(1,586)
Reclassified from AOCI to cost of sales-
Gain (loss) before income taxes	248	(2,028)	(2,060)
Less income tax provision (benefit)	92	(752)	(769)
Net	156	(1,276)	(1,291)
Net change to AOCI	$ (2,350)	$ 610	$ (295)