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, unless otherwise specified
Jul. 31, 2014
Jul. 31, 2013
Schedule of Property, Plant And Equipment [Abstract]    
Building and building improvements $ 4,834 $ 4,751
Machinery and equipment (includes asset under capital lease - see Note 9) 7,125 6,922
Office furniture and computer equipment 16,834 16,390
Leasehold improvements 4,835 4,759
33,628 32,822
Accumulated depreciation and amortization (26,610) (24,917)
7,018 7,905
Land and land improvements 712 712
$ 7,730 $ 8,617