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Financial Instruments and Credit Risk Concentrations (Details)
3 Months Ended 12 Months Ended
Oct. 31, 2016
USD ($)
tenants
Oct. 31, 2015
Jul. 31, 2016
USD ($)
Concentration Risk [Line Items]      
Irrevocable letter of credit | $ $ 230,000   $ 230,000
Number of tenants | tenants 49    
Customer One [Member] | Rental Income [Member]      
Concentration Risk [Line Items]      
Concentration risk 18.66% 18.81%  
Customer Two [Member] | Rental Income [Member]      
Concentration Risk [Line Items]      
Concentration risk 15.10% 15.56%  
Customer Three [Member] | Rental Income [Member]      
Concentration Risk [Line Items]      
Concentration risk 10.52%