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Sale of property (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2016
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Jun. 17, 2016
Real Estate Properties [Line Items]            
Agreed sales price of property held for sale       $ 3,059,000  
Gain on sale of property held for sale   $ 314,000 314,000  
Lakeland Bank Property [Member]            
Real Estate Properties [Line Items]            
Rental properties           $ 2,700,000
Straight-line rent receivable on property held for sale           $ 500,000
Agreed sales price of property held for sale $ 3,100,000          
Gain on sale of property held for sale $ 314,000          
Maximum purchase price of property       3,000,000    
Lost annual rents due to sale of property       $ 241,000