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Inventories (Tables)
6 Months Ended
Jan. 31, 2017
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of the following at:
 
 
January 31, 2017
 
July 31, 2016
Raw materials and components
 
$
54,913,000

 
54,723,000

Work-in-process and finished goods
 
32,027,000

 
32,829,000

Total inventories
 
86,940,000

 
87,552,000

Less reserve for excess and obsolete inventories
 
15,772,000

 
16,198,000

Inventories, net
 
$
71,168,000

 
71,354,000