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Segments (Net Operating Income by Segment) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net Operating Income [Abstract]
Rental income	$ 7,693,017	$ 6,007,567	$ 23,602,360	$ 16,747,951
Property and related expenses	(2,576,781)	(1,902,454)	(7,635,145)	(5,742,548)
Net operating income, as defined	5,276,852	4,209,148	16,456,780	11,201,773
General and administrative expenses	(1,340,197)	(1,181,714)	(3,947,627)	(3,475,628)
Depreciation and amortization	(2,564,211)	(1,884,193)	(7,723,372)	(5,560,525)
Interest expense	(3,323,740)	(2,630,737)	(10,187,983)	(7,286,351)
Interest income	9,892	26,220	78,224	61,976
Gain on sale of real estate	732,908	10,858	2,121,453	5,936,010
Impairment of real estate	(700,000)		(700,000)
Net (loss) income	(1,908,496)	(1,450,418)	(3,902,525)	877,255
Industrial Office Properties [Member]
Net Operating Income [Abstract]
Rental income	6,135,845	4,715,807	19,166,498	13,075,111
Property and related expenses	(2,151,461)	(1,679,926)	(6,510,789)	(4,885,154)
Net operating income, as defined	3,984,384	3,035,881	12,655,709	8,189,957
Residential Properties [Member]
Net Operating Income [Abstract]
Rental income	548,260	414,286	1,555,405	1,117,616
Property and related expenses	(25,061)	(15,530)	(94,142)	(50,377)
Net operating income, as defined	523,199	398,756	1,461,263	1,067,239
Retail Properties [Member]
Net Operating Income [Abstract]
Rental income	1,100,623	981,509	3,277,619	2,952,646
Property and related expenses	(331,354)	(206,998)	(937,811)	(876,694)
Net operating income, as defined	$ 769,269	$ 774,511	$ 2,339,808	2,075,952
Self Storage Properties [Member]
Net Operating Income [Abstract]
Rental income				1,052,266
Property and related expenses				(1,183,641)
Net operating income, as defined				$ (131,375)

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

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