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Note 5 - Derivative Financial Instruments (Tables)
 9 Months Ended
Jan. 28, 2017
Notes Tables  
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]
   
(In thousands)
  
   
Three Months Ended
    
Nine Months Ended
  
   
2017
    
2016
    
2017
    
2016
  
Recognized in AOCI:
                                
Gain (loss) before income taxes
   $
176
     $
620
     $
(21
 )   $
(6,444
 )
Less income tax provision (benefit)
    
65
      
230
      
(8
 )    
(2,391
 )
Net
   $
111
     $
390
     $
(13
 )   $
(4,053
 )
Reclassified from AOCI to cost of sales:
                                
Loss before income taxes
   $
(651
 )   $
(2,171
 )   $
(2,844
 )   $
(6,008
 )
Less income tax benefit
   
(242
 )    
(806
 )    
(1,056
 )    
(2,229
 )
Net
   $
(409
 )   $
(1,365
 )   $
(1,788
 )   $
(3,779
 )
Net change to AOCI
   $
520
     $
1,755
     $
1,775
     $
(274
 )