Organization and significant accounting policies (Narrative) (Details) - USD ($)	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Advertising costs	$ 296,000	$ 386,000	$ 257,000
Amortization of mortgage costs and leasing commissions	1,050,000	$ 1,298,000	$ 543,000
Transaction costs	19,600,000
Station Place on Monmouth, LLC [Member]
Transaction costs	$ 550,000