Segments, Net Operating Income by Segment (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Segment	Jun. 30, 2013
Segments [Abstract]
Number of reportable segments			4
Net Operating Income [Abstract]
Rental income	$ 4,691,871	$ 4,857,269	$ 9,471,710	$ 10,025,865
Property and related expenses	1,742,830	1,623,937	3,410,145	3,185,873
Net operating income, as defined, for reportable segments	(41,668)	669,980	600,243	1,794,009
Reportable Segments [Member]
Net Operating Income [Abstract]
Net operating income, as defined, for reportable segments	2,949,041	3,233,332	6,061,565	6,839,992
Reportable Segments [Member] \| Industrial/Office Properties [Member]
Net Operating Income [Abstract]
Rental income	2,639,041	2,634,708	5,246,281	5,210,357
Property and related expenses	1,102,117	806,970	2,141,203	1,657,430
Net operating income, as defined, for reportable segments	1,536,924	1,827,738	3,105,078	3,552,927
Reportable Segments [Member] \| Residential Properties [Member]
Net Operating Income [Abstract]
Rental income	572,876	756,100	1,244,062	1,630,418
Property and related expenses	38,108	189,205	44,843	331,318
Net operating income, as defined, for reportable segments	534,768	566,895	1,199,219	1,299,100
Reportable Segments [Member] \| Retail Properties [Member]
Net Operating Income [Abstract]
Rental income	630,863	644,498	1,271,689	1,640,372
Property and related expenses	215,072	203,009	429,804	387,304
Net operating income, as defined, for reportable segments	415,791	441,489	841,885	1,253,068
Reportable Segments [Member] \| Self Storage Properties [Member]
Net Operating Income [Abstract]
Rental income	849,091	821,963	1,709,678	1,544,718
Property and related expenses	387,533	424,753	794,295	809,821
Net operating income, as defined, for reportable segments	$ 461,558	$ 397,210	$ 915,383	$ 734,897

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

No definition available.

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- Definition

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

+ References

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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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