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Real Estate and Intangible Assets - Summary of Geographic Locations, by State, of Properties (Detail) |  | 3 Months Ended | 6 Months Ended
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Jun. 30, 2015 a Farm | Jun. 30, 2015 USD ($) a | Jun. 30, 2014 USD ($) a | Jun. 30, 2015 USD ($) a Farm | Jun. 30, 2014 USD ($) a Farm
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm | 36 |  |  | 36 | 26
Total Acres | 11,467 | 11,467 | 6,439 | 11,467 | 6,439
% of Total Acres |  |  |  | 100.00% | 100.00%
Rental revenue | $ |  | $ 2,780,456 | $ 1,561,291 | $ 5,402,783 | $ 3,056,927
% of Total Rental Revenue |  |  |  | 100.00% | 100.00%
California [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm | 15 |  |  | 15 | 9
Total Acres | 2,722 | 2,722 | 1,599 | 2,722 | 1,599
% of Total Acres | 23.70% |  |  | 23.70% | 24.80%
Rental revenue | $ |  |  |  | $ 3,712,894 | $ 2,051,017
% of Total Rental Revenue |  |  |  | 68.70% | 67.10%
Florida [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm | 12 |  |  | 12 | 8
Total Acres | 4,401 | 4,401 | 496 | 4,401 | 496
% of Total Acres | 38.40% |  |  | 38.40% | 7.70%
Rental revenue | $ |  |  |  | $ 820,834 | $ 240,304
% of Total Rental Revenue |  |  |  | 15.20% | 7.90%
Oregon [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm |  |  |  | 4 | 4
Total Acres | 2,313 | 2,313 | 2,313 | 2,313 | 2,313
% of Total Acres |  |  |  | 20.20% | 35.90%
Rental revenue | $ |  |  |  | $ 583,763 | $ 492,121
% of Total Rental Revenue |  |  |  | 10.80% | 16.10%
Arizona [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm |  |  |  | 1 | 1
Total Acres | 1,761 | 1,761 | 1,761 | 1,761 | 1,761
% of Total Acres |  |  |  | 15.40% | 27.40%
Rental revenue | $ |  |  |  | $ 161,935 | $ 145,328
% of Total Rental Revenue |  |  |  | 3.00% | 4.70%
Michigan [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm |  |  |  | 4 | 4
Total Acres | 270 | 270 | 270 | 270 | 270
% of Total Acres |  |  |  | 2.30% | 4.20%
Rental revenue | $ |  |  |  | $ 123,357 | $ 128,157
% of Total Rental Revenue |  |  |  | 2.30% | 4.20%

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