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Other (Expense) Income, Net (Details Textual) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
May. 01, 2013
Jul. 31, 2015
Jul. 31, 2014
Jul. 31, 2013
Other (Expense) Income, Net [Line Items]        
Payments to Lender $ 21,100      
Gain on modification and early termination of note payable   $ 238
April 30, 2013 [Member]        
Other (Expense) Income, Net [Line Items]        
Gain on modification and early termination of note payable       $ 200