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Note 2 - Property, Plant and Equipment (Tables)
3 Months Ended
Jul. 29, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
(In thousands)
 
   
July 29,
2017
   
April 29,
2017
 
Land
  $
9,500
    $
9,500
 
Buildings and improvements
   
51,164
     
51,157
 
Machinery and equipment
   
175,778
     
172,257
 
Total
   
236,442
     
232,914
 
Less accumulated depreciation
   
(170,292
)    
(167,764
)
Property, plant and equipment – net
  $
66,150
    $
65,150