Segments, Net Operating Income by Segment (Details) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Segment	Sep. 30, 2013
Segments [Abstract]
Number of reportable segments			4
Net Operating Income [Abstract]
Rental income	$ 5,085,119	$ 4,789,367	$ 14,556,829	$ 14,815,232
Property and related expenses	1,984,801	1,691,280	5,394,946	4,841,809
Total net operating income, as defined, for reportable segments	285,279	578,101	885,523	2,372,110
Reportable Segments [Member]
Net Operating Income [Abstract]
Total net operating income, as defined, for reportable segments	3,100,318	3,098,087	9,161,883	9,973,423
Reportable Segments [Member] \| Industrial/Office Properties [Member]
Net Operating Income [Abstract]
Rental income	3,122,423	2,638,194	8,368,703	7,848,551
Property and related expenses	1,277,080	963,919	3,418,279	2,764,489
Total net operating income, as defined, for reportable segments	1,845,343	1,674,275	4,950,424	5,084,062
Reportable Segments [Member] \| Residential Properties [Member]
Net Operating Income [Abstract]
Rental income	479,400	696,922	1,723,462	2,327,340
Property and related expenses	18,212	25,722	63,055	178,556
Total net operating income, as defined, for reportable segments	461,188	671,200	1,660,407	2,148,784
Reportable Segments [Member] \| Retail Properties [Member]
Net Operating Income [Abstract]
Rental income	649,649	614,979	1,921,338	2,255,351
Property and related expenses	228,010	234,942	657,814	622,246
Total net operating income, as defined, for reportable segments	421,639	380,037	1,263,524	1,633,105
Reportable Segments [Member] \| Self Storage Properties [Member]
Net Operating Income [Abstract]
Rental income	833,648	839,272	2,543,326	2,383,990
Property and related expenses	461,503	466,697	1,255,798	1,276,518
Total net operating income, as defined, for reportable segments	$ 372,145	$ 372,575	$ 1,287,528	$ 1,107,472

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

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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