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Segments (Reconciliation to Net Income Loss) (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Segment Reporting Information [Line Items] |  |  |  |
Revenues | $ 4,344,491 | $ 3,344,300 | $ 12,192,209 | $ 9,495,478
Rental operating costs | 1,433,570 | 1,237,491 | 3,955,280 | 3,447,532
Interest Income Mortgage Loans | 21,010 | 45,925 | 57,534 | 78,895
Interest Income, Other | 286,514 | 8,680 | 290,474 | 23,301
Gain on sale of real estate | 81,695 | (32,424) | 180,770 | (56,911)
General and administrative | 980,508 | 791,655 | 3,176,778 | 2,656,195
Interest expense | 1,106,966 | 751,326 | 3,037,641 | 2,121,382
Depreciation and amortization | 1,178,239 | 995,946 | 3,446,529 | 2,858,802
Net income (loss) from continuing operations | 34,427 | (409,937) | (895,241) | (1,543,148)
Income (loss) attributable to noncontrolling interests | 114,051 | 57,740 | 277,159 | 258,737
Net loss | (376,418) | (417,597) | (1,381,250) | (1,686,801)
Industrial Office Properties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 2,350,032 | 1,805,193 | 6,499,299 | 4,904,303
Rental operating costs | 806,940 | 742,206 | 2,204,997 | 1,983,374
Operating Income (Loss) | 1,543,092 | 1,062,987 | 4,294,302 | 2,920,929
Residential Properties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 731,188 | 674,740 | 1,902,971 | 2,116,978
Rental operating costs | 75,185 | 46,160 | 161,691 | 129,840
Operating Income (Loss) | 656,003 | 628,580 | 1,741,280 | 1,987,138
Retail Properties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 532,324 | 287,065 | 1,601,133 | 779,674
Rental operating costs | 191,723 | 109,354 | 506,101 | 287,350
Operating Income (Loss) | 340,601 | 177,711 | 1,095,032 | 492,324
Self Storage Properties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 730,947 | 577,302 | 2,188,806 | 1,694,523
Rental operating costs | 359,722 | 339,771 | 1,082,491 | 1,046,968
Operating Income (Loss) | 371,225 | 237,531 | 1,106,315 | 647,555
Reportable Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | $ 2,931,931 | $ 2,152,734 | $ 8,294,463 | $ 6,126,841

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