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Segments (Reconciliation to Net Income Loss) (Details) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Segment Reporting Information [Line Items] |  |  |  |
Revenues | $ 4,857,269 | $ 4,273,140 | $ 10,025,865 | $ 8,361,326
Rental operating costs | 1,510,787 | 1,331,904 | 3,007,389 | 2,665,035
Interest Income Mortgage Loans | 14,738 | 18,333 | 29,314 | 36,523
Interest Income, Other | 55,701 | 1,792 | 62,381 | 3,961
Gain on sale of real estate | 410,258 | 54,993 | 856,911 | 99,075
General and administrative | 1,350,968 | 1,071,552 | 2,583,729 | 2,196,270
Interest expense | 1,219,329 | 1,071,686 | 2,553,355 | 2,053,170
Depreciation and amortization | 1,325,534 | 1,214,150 | 2,640,738 | 2,390,888
Income (loss) attributable to noncontrolling interests | 327,550 | 92,187 | 638,611 | 200,354
Net (loss) income | (396,202) | (433,221) | (449,351) | (1,004,832)
Industrial Office Properties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 2,634,708 | 2,129,857 | 5,210,357 | 4,149,268
Rental operating costs | 806,970 | 716,548 | 1,657,430 | 1,398,057
Operating Income (Loss) | 1,827,738 | 1,413,309 | 3,552,927 | 2,751,211
Residential Properties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 756,100 | 659,375 | 1,630,418 | 1,313,556
Rental operating costs | 76,055 | 77,893 | 152,834 | 153,836
Operating Income (Loss) | 680,045 | 581,482 | 1,477,584 | 1,159,720
Retail Properties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 644,498 | 740,288 | 1,640,372 | 1,440,644
Rental operating costs | 203,009 | 184,610 | 387,304 | 390,373
Operating Income (Loss) | 441,489 | 555,678 | 1,253,068 | 1,050,271
Self Storage Properties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 821,963 | 743,620 | 1,544,718 | 1,457,858
Rental operating costs | 424,753 | 352,853 | 809,821 | 722,769
Operating Income (Loss) | 397,210 | 390,767 | 734,897 | 735,089
Reportable Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income (Loss) | $ 3,361,220 | $ 2,959,569 | $ 7,047,790 | $ 5,732,814

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