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Note 3 - Accrued Liabilities (Tables)
 12 Months Ended
Apr. 29, 2017
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   
(In thousands)
  
   
2017
    
2016
  
Accrued compensation
   $
9,967
     $
9,217
  
Accrued promotions
    
8,403
      
5,888
  
Accrued insurance
    
2,938
      
2,786
  
Other
    
7,709
      
8,304
  
Total
   $
29,017
     $
26,195