Income taxes (Details) - USD ($)			9 Months Ended	12 Months Ended
	Jun. 18, 2014	Dec. 20, 2013	Jul. 31, 2015	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Ordinary taxable income distributed as dividends (percentage)				100.00%	100.00%
Capital gain on sale of apartments						$ 3,500,000
South Brunswick property [Member]
Capital gain on sale of apartments		$ 8,700,000
Regency Club Acquisition [Member]
Acquisition price	$ 20,625,000
Amount tax basis is lower than the acquisition price			$ 8,000,000