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Note 2 - Property, Plant and Equipment (Tables)
9 Months Ended
Jan. 31, 2015
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
(In thousands)
 
   
January 31, 
2015 
   
May 3,
2014
 
Land
  $ 9,500     $ 9,779  
Buildings and improvements
    49,809       51,494  
Machinery and equipment
    155,325       148,699  
Total
    214,634       209,972  
Less accumulated depreciation
    (156,437 )     (150,478 )
Property, plant and equipment – net
  $ 58,197     $ 59,494