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Property, Plant and Equipment (Tables)
12 Months Ended
Jul. 31, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant, and Equipment
 
 
2013
 
2012
Machinery and equipment
 
$
103,812,000

 
101,272,000

Leasehold improvements
 
11,558,000

 
11,162,000

 
 
115,370,000

 
112,434,000

Less accumulated depreciation and amortization
 
95,037,000

 
89,602,000

Property, plant and equipment, net
 
$
20,333,000

 
22,832,000