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Note 5 - Derivative Financial Instruments - Derivatives Instruments, Statements of Financial Performance and Financial Position (Details) - USD ($)
$ in Thousands
3 Months Ended
Jul. 29, 2017
Jul. 30, 2016
Recognized in AOCI:    
Loss before income taxes $ (967) $ (450)
Less income tax benefit (359) (167)
Net (608) (283)
Reclassified from AOCI to cost of sales:    
Gain (loss) before income taxes 31 (1,110)
Less income tax provision (benefit) 11 (412)
Net 20 (698)
Net change to AOCI $ (628) $ 415