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Mortgage refinancings (Details) - USD ($)
9 Months Ended
Jul. 31, 2015
Jul. 31, 2014
Oct. 31, 2014
Nov. 19, 2013
Debt Instrument [Line Items]        
Construction and pre-development costs $ 37,806,000 $ 22,244,000    
Mortgages [Member] | Refinanced Maywood, NJ Mortgage [Member]        
Debt Instrument [Line Items]        
Refinanced loan amount 19,700,000      
Loan amount $ 9,400,000      
Annual interest costs 4.54%     6.40%
Net proceeds from refinancing of debt $ 10,000,000      
Notes Payable, Other Payables [Member] | Baltimore, MD [Member]        
Debt Instrument [Line Items]        
Construction and pre-development costs 63,000,000      
Line of credit 82,000,000      
Repayments of debt to affiliate $ 19,000,000      
Provident Bank [Member]        
Debt Instrument [Line Items]        
Basis points, interest rate 1.25%      
Loan amount $ 16,200,000      
Amount drawn on loan $ 5,000,000      
Annual interest costs 3.75%      
Monthly principal payment amount $ 27,807      
Construction Loan [Member]        
Debt Instrument [Line Items]        
Refinanced loan amount   $ 15,000,000    
Loan amount 25,000,000   $ 25,000,000  
Amount drawn on loan $ 19,000,000      
Construction Loan [Member] | Baltimore, MD [Member]        
Debt Instrument [Line Items]        
Basis points, interest rate 2.25%      
Loan amount $ 120,000,000      
Term of the loan 4 years