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Inventories (Tables)
 3 Months Ended
Jul. 30, 2017
Inventory Disclosure [Abstract]  
Summary of Inventories
A summary of inventories follows:
 
(dollars in thousands)
  
July 30, 2017
    
July 31, 2016
    
April 30, 2017
  
Raw materials
  
$
6,956
    
$
6,779
    
$
6,456
  
Work-in-process
    
2,782
      
3,224
      
3,095
  
Finished goods
    
45,489
      
38,128
      
41,931
  
   
$
55,227
    
$
48,131
    
$
51,482