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Inventories (Tables)
12 Months Ended
Jul. 31, 2012
Inventories [Abstract]  
Inventories
Inventories as of July 31, 2012 and 2011 were as follows (dollars in thousands):

   
2012
  
2011
 
Raw material and component parts
 $8,670  $6,205 
Work in progress
  1,663   1,172 
Finished goods
  5,346   4,705 
   $15,679  $12,082