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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

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