Annual report pursuant to Section 13 and 15(d)

Property, plant, and equipment (Details) - Schedule of property, plant and equipment

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Property, plant, and equipment (Details) - Schedule of property, plant and equipment - USD ($)
$ in Thousands
Jul. 31, 2015
Jul. 31, 2014
Schedule of property, plant and equipment [Abstract]    
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