Segments (Reconciliation to Net Income Loss) (Details) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting Information [Line Items]
Revenues	$ 4,273,140	$ 3,297,223	$ 8,361,326	$ 6,624,453
Rental operating costs	1,331,904	1,241,519	2,665,035	2,348,978
Interest Income Mortgage Loans	18,333	17,236	36,523	32,970
Interest Income, Other	1,792	6,181	3,961	14,621
Gain on sale of real estate	54,993	57,790	99,075	(24,487)
General and administrative	1,071,552	946,838	2,196,270	1,864,540
Interest expense	1,071,686	767,723	2,053,170	1,496,087
Depreciation and amortization	1,214,150	1,002,552	2,390,888	1,981,038
Net loss before noncontrolling interests	(341,034)	(580,202)	(804,478)	(1,043,086)
Income (loss) attributable to noncontrolling interests	92,187	150,203	200,354	226,118
Net loss	(433,221)	(730,405)	(1,004,832)	(1,269,204)
Industrial Office Properties [Member]
Segment Reporting Information [Line Items]
Revenues	2,129,857	1,623,027	4,149,268	3,099,108
Rental operating costs	716,548	660,000	1,398,057	1,254,235
Operating Income (Loss)	1,413,309	963,027	2,751,211	1,844,873
Residential Properties [Member]
Segment Reporting Information [Line Items]
Revenues	659,375	706,438	1,313,556	1,568,855
Rental operating costs	77,893	90,789	153,836	142,926
Operating Income (Loss)	581,482	615,649	1,159,720	1,425,929
Retail Properties [Member]
Segment Reporting Information [Line Items]
Revenues	740,288	410,214	1,440,644	839,266
Rental operating costs	184,610	132,184	390,373	244,616
Operating Income (Loss)	555,678	278,030	1,050,271	594,650
Self Storage Properties [Member]
Segment Reporting Information [Line Items]
Revenues	743,620	557,544	1,457,858	1,117,224
Rental operating costs	352,853	358,546	722,769	707,201
Operating Income (Loss)	390,767	198,998	735,089	410,023
Reportable Segment [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	$ 2,959,569	$ 2,072,940	$ 5,732,814	$ 4,308,445

Interest income from mortgage loans.

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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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Costs incurred and are directly related to generating revenues from leased and rented property or equipment.

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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Amount of income (loss) from continuing operations attributable to the noncontrolling interest. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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Amount of interest income earned from interest bearing assets not separately disclosed.

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

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Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

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