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Segments (Net Operating Income by Segment) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Net Operating Income [Abstract] |  |  |  |
Rental income | $ 7,658,273 | $ 5,396,700 | $ 15,909,341 | $ 10,740,383
Property and related expenses | (2,585,013) | (1,910,903) | (5,058,364) | (3,840,094)
Net operating income, as defined | 5,221,261 | 3,519,310 | 11,179,927 | 6,992,623
General and administrative expenses | (1,308,471) | (1,139,112) | (2,607,430) | (2,293,914)
Depreciation and amortization | (2,499,630) | (1,814,786) | (5,159,161) | (3,676,332)
Interest expense | (3,501,199) | (2,276,022) | (6,864,243) | (4,655,614)
Interest income | 46,593 | 21,153 | 68,332 | 35,757
Gain on sale of real estate | 1,213,060 | 5,846,656 | 1,388,545 | 5,925,152
Net (loss) income | (828,386) | 4,157,199 | (1,994,030) | 2,327,672
Industrial Office Properties [Member] |  |  |  |
Net Operating Income [Abstract] |  |  |  |
Rental income | 6,200,968 | 4,085,110 | 13,194,587 | 8,175,946
Property and related expenses | (2,140,237) | (1,564,983) | (4,373,491) | (3,135,551)
Net operating income, as defined | 4,060,731 | 2,520,127 | 8,821,096 | 5,040,395
Residential Properties [Member] |  |  |  |
Net Operating Income [Abstract] |  |  |  |
Rental income | 567,281 | 345,427 | 955,681 | 817,010
Property and related expenses | (61,376) | (23,609) | (78,416) | (34,847)
Net operating income, as defined | 505,905 | 321,818 | 877,265 | 782,163
Retail Properties [Member] |  |  |  |
Net Operating Income [Abstract] |  |  |  |
Rental income | 1,038,025 | 955,259 | 2,088,023 | 1,971,136
Property and related expenses | (383,400) | (322,311) | (606,457) | (669,696)
Net operating income, as defined | $ 654,625 | 632,948 | $ 1,481,566 | 1,301,440
Self Storage Properties [Member] |  |  |  |
Net Operating Income [Abstract] |  |  |  |
Rental income |  | 159,289 |  | 1,052,266
Property and related expenses |  | (114,872) |  | (1,183,641)
Net operating income, as defined |  | $ 44,417 |  | $ (131,375)

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