ORGANIZATION, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Segment Reporting - Concentration Risks (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2020 ft²	Jul. 31, 2019	Jul. 31, 2020 ft² Segment	Jul. 31, 2019	Oct. 31, 2019
Segment Reporting [Abstract]
Number of reportable segments | Segment			1
Ridgeway Significant Tenants [Abstract]
Gross leasable area of properties the Company owned or had equity interest in	5,300,000		5,300,000
Ridgeway [Member]
Ridgeway Significant Tenants [Abstract]
Gross leasable area of properties the Company owned or had equity interest in	374,000		374,000
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Ridgeway [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage	11.10%	10.90%	11.20%	10.80%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | All Other Operating Segments [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage	88.90%	89.10%	88.80%	89.20%
Assets, Total [Member] | Customer Concentration Risk [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage			100.00%		100.00%
Assets, Total [Member] | Customer Concentration Risk [Member] | Ridgeway [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage			6.40%		6.00%
Assets, Total [Member] | Customer Concentration Risk [Member] | All Other Operating Segments [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage			93.60%		94.00%
Base Rent [Member] | Customer Concentration Risk [Member] | Ridgeway [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Percent leased			98.00%		97.00%
Base Rent [Member] | Customer Concentration Risk [Member] | The Stop & Shop Supermarket Company [Member] | Ridgeway [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage	25.00%	21.00%	21.00%	21.00%
Base Rent [Member] | Customer Concentration Risk [Member] | Bed, Bath & Beyond [Member] | Ridgeway [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage	17.00%	15.00%	15.00%	14.00%
Base Rent [Member] | Customer Concentration Risk [Member] | Marshall's Inc., [Member] | Ridgeway [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage	17.00%	11.00%	12.00%	10.00%
Base Rent [Member] | Customer Concentration Risk [Member] | All Other Tenants at Ridgeway [Member] | Ridgeway [Member]
Ridgeway Significant Tenants [Abstract]
Concentration risk, percentage	41.00%	53.00%	52.00%	55.00%