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Segments (Net Operating Income by Segment) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Operating Income [Abstract]
Rental income	$ 8,251,068	$ 5,343,684
Property and related expenses	(2,473,351)	(1,939,589)
Net operating income, as defined	5,984,223	3,473,314
General and administrative expenses	(1,298,959)	(1,154,801)
Depreciation and amortization	(2,659,531)	(1,861,546)
Interest expense	(3,388,602)	(2,379,592)
Interest income	21,739	14,604
Gain on sale of real estate	175,486	78,496
Net loss	(1,165,644)	(1,829,525)
Industrial Office Properties [Member]
Net Operating Income [Abstract]
Rental income	7,019,176	4,008,818
Property and related expenses	(2,232,590)	(1,580,965)
Net operating income, as defined	4,786,586	2,427,853
Residential Properties [Member]
Net Operating Income [Abstract]
Rental income	388,400	357,903
Property and related expenses	(17,704)	(11,238)
Net operating income, as defined	370,696	346,665
Retail Properties [Member]
Net Operating Income [Abstract]
Rental income	1,049,998	1,015,878
Property and related expenses	(223,057)	(347,385)
Net operating income, as defined	$ 826,941	668,493
Self Storage Properties [Member]
Net Operating Income [Abstract]
Rental income		892,977
Property and related expenses		(862,674)
Net operating income, as defined		$ 30,303

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General And Administrative Expense Including Income tax expense (Benefit).

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount of expense incurred and directly related to generating revenue from leased and rented property or equipment.

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The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

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