ORGANIZATION, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) shares in Thousands, ft² in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017 USD ($) ft² Property shares	Apr. 30, 2016 USD ($) shares	Apr. 30, 2017 USD ($) ft² Property shares	Apr. 30, 2016 USD ($) shares	Oct. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)
ORGANIZATION, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Number of properties the Company owned or had equity interest in | Property	80		80
Gross leasable area of properties the Company owned or had equity interest in | ft²	5.0		5.0
Minimum real estate trust taxable income required to be distributed for REIT to be nontaxable			90.00%
Comprehensive income [Abstract]
Net unrealized gains/losses on an interest rate swap agreement included in accumulated other comprehensive income	$ 2,300,000		$ 2,300,000		$ (1,300,000)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	29,992,000	$ 29,166,000	58,959,000	$ 56,617,000
Depreciation and amortization	(6,183,000)	(5,659,000)	(12,764,000)	(11,347,000)
Net Income	27,919,000	8,556,000	35,123,000	15,228,000
Gain (Loss) on Sale of Properties			19,460,000	0
Straight-line rents receivable	$ 17,197,000		$ 17,197,000		16,829,000
Allowance of doubtful accounts against tenants receivables, percentage of deferred straight-line rents receivable	10.00%		10.00%
Tenants receivable, allowance for doubtful accounts	$ 4,566,000		$ 4,566,000		$ 4,097,000
Numerator [Abstract]
Net income applicable to common and Class A common stockholders - basic	24,101,000	4,769,000	27,513,000	7,646,000
Mortgage Loan [Member] | New Ridgeway Mortgage Loan [Member]
Derivative Financial Instruments [Abstract]
Forward loan commitment, face amount						$ 50,000,000
White Plains, NY [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from sale of property held for sale			56,600,000
Revenues	0	1,362,000	0	1,457,000
Property operating expense	(65,000)	(362,000)	(322,000)	(691,000)
Depreciation and amortization	0	(281,000)	0	(567,000)
Net Income	(65,000)	719,000	(322,000)	199,000
Gain (Loss) on Sale of Properties			$ 19,500,000
Minimum [Member]
Income Tax Contingency [Line Items]
Tax years remaining open to examination by Internal Revenue Service			2013
Maximum [Member]
Income Tax Contingency [Line Items]
Tax years remaining open to examination by Internal Revenue Service			2016
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life			30 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life			40 years
Property Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life			10 years
Property Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life			20 years
Furniture/Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life			3 years
Furniture/Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life			10 years
Tenant Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life			Shorter of lease term or their useful life
Interest Rate Swap [Member]
Derivative Financial Instruments [Abstract]
Notional amount						$ 50,000,000
Fixed annual rate						3.398%
Interest Rate Swap [Member] | Mortgage Loan [Member]
Derivative Financial Instruments [Abstract]
Mortgage loans subject to interest rate swap	$ 34,500,000		$ 34,500,000
Average fixed annual rate on interest rate swap	3.79%		3.79%
Interest Rate Derivative Assets, at Fair Value	$ 496,000		$ 496,000
Deferred liabilities relating to fair value of interest rate swap	739,000		739,000
Interest Rate Swap [Member] | Mortgage Loan [Member] | New Ridgeway Mortgage Loan [Member]
Derivative Financial Instruments [Abstract]
Interest Rate Derivative Assets, at Fair Value	2,600,000		2,600,000
Common Stock [Member]
Numerator [Abstract]
Net income applicable to common and Class A common stockholders - basic	4,876,000	1,042,000	5,565,000	1,670,000
Effect of dilutive securities [Abstract]
Restricted Stock awards	263,000	58,000	280,000	83,000
Net income applicable to common stockholders - diluted	$ 5,139,000	$ 1,100,000	$ 5,845,000	$ 1,753,000
Denominator [Abstract]
Denominator for basic EPS - weighted average common shares (in shares) | shares	8,383	8,241	8,382	8,240
Effect of dilutive securities [Abstract]
Restricted stock awards (in shares) | shares	636	665	584	581
Denominator for diluted EPS - weighted average common equivalent shares (in shares) | shares	9,019	8,906	8,966	8,821
Class A Common Stock [Member]
Numerator [Abstract]
Net income applicable to common and Class A common stockholders - basic	$ 19,225,000	$ 3,727,000	$ 21,948,000	$ 5,976,000
Effect of dilutive securities [Abstract]
Restricted Stock awards	(263,000)	(58,000)	(280,000)	(83,000)
Net income applicable to common stockholders - diluted	$ 18,962,000	$ 3,669,000	$ 21,668,000	$ 5,893,000
Denominator [Abstract]
Denominator for basic EPS - weighted average common shares (in shares) | shares	29,313	26,081	29,312	26,081
Effect of dilutive securities [Abstract]
Restricted stock awards (in shares) | shares	194	193	161	143
Denominator for diluted EPS - weighted average common equivalent shares (in shares) | shares	29,507	26,274	29,473	26,224