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Property, Plant and Equipment (Tables)
12 Months Ended
Jul. 31, 2011
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment

 

2011

 

2010

Machinery and equipment

$    96,976,000

 

     92,006,000

Leasehold improvements

        9,904,000

 

       9,581,000

 

106,880,000

 

   101,587,000

Less accumulated depreciation and amortization

     80,242,000

 

     67,860,000

           Property, plant and equipment, net

$          26,638,000

 

     33,727,000