Annual report pursuant to Section 13 and 15(d)

Property, plant, and equipment (Tables)

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Property, plant, and equipment (Tables)
 12 Months Ended
Jul. 31, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Table Text Block] At July 31, 2015 and 2014 property, plant, and equipment consist of:

    2015     2014  
Building and building improvements   $ 4,854     $ 4,834  
Machinery and equipment (includes asset under capital lease - see Note 9)     7,397       7,125  
Office furniture and computer equipment     18,289       16,834  
Leasehold improvements     4,958       4,835  
      35,498       33,628  
Accumulated depreciation and amortization     (28,262 )     (26,610 )
      7,236       7,018  
Land and land improvements     712       712  
    $ 7,948     $ 7,730