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Inventories (Tables)
 12 Months Ended
Jul. 31, 2015
Inventories [Abstract]  
Inventories
Inventories as of July 31, 2015 and 2014 were as follows (dollars in thousands):
 
 
2015
  
2014
 
Raw material and component parts
 
$
7,909
  
$
5,900
 
Work in progress
  
2,248
   
2,077
 
Finished goods
  
6,539
   
7,157
 
  
$
16,696
  
$
15,134