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Note 6 - Derivative Financial Instruments - Derivatives Instruments, Statements of Financial Performance and Financial Position (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 29, 2017
Apr. 30, 2016
May 02, 2015
Recognized in AOCI-      
Loss before income taxes $ (984) $ (5,743) $ (3,488)
Less income tax benefit (365) (2,131) (1,294)
Net (619) (3,612) (2,194)
Reclassified from AOCI to cost of sales-      
(Loss) gain before income taxes (2,749) (6,987) 248
Less income tax (benefit) provision (1,020) (2,592) 92
Net (1,729) (4,395) 156
Net change to AOCI $ 1,110 $ 783 $ (2,350)