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Property, Buildings and Equipment, net (Details)
3 Months Ended 9 Months Ended
Apr. 30, 2016
USD ($)
Building
May 02, 2015
USD ($)
Apr. 30, 2016
USD ($)
May 02, 2015
USD ($)
Jul. 31, 2015
USD ($)
Property, Plant and Equipment [Line Items]          
Net book value of buildings $ 6,340,780   $ 6,340,780   $ 7,113,694
Insurance proceeds received $ 358,565 $ 0 358,565 $ 0  
Number of buildings damaged | Building 2        
Buildings [Member]          
Property, Plant and Equipment [Line Items]          
Net book value of buildings $ 1,900,000   $ 1,900,000    
Impairment loss 400,000        
Insurance proceeds received $ 400,000