Pathmark Stores, Inc. Bankruptcy Filing (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Receivables arising from straight-lining of rents	$ 3,359,000	$ 3,359,000	$ 2,725,000
Straight line rent adjustment - bankrupt tenant				$ 1,046,000
Pathmark Stores, Inc. [Member]
Lease rejected by bankruptcy court	6,500,000	$ 6,500,000
Receivables arising from straight-lining of rents				$ 1,046,000
Straight line rent adjustment - bankrupt tenant	$ 1,046,000
Straight line rent adjustment - bankrupt tenant, per basic and diluted share	$ 0.15
Lost annual rents due to bankrupt tenant	$ 1,400,000