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Note 6 - Derivative Financial Instruments (Tables)
 12 Months Ended
Apr. 29, 2017
Notes Tables  
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]
   
(In thousands)
  
   
Fiscal
    
Fiscal
    
Fiscal
  
   
2017
    
2016
    
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
 )