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Real Estate and Intangible Assets - Summary of Geographic Locations, by State, of Properties (Detail) |  | 3 Months Ended | 9 Months Ended
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Sep. 30, 2015 a Farm | Sep. 30, 2015 USD ($) a | Sep. 30, 2014 USD ($) a | Sep. 30, 2015 USD ($) a Farm | Sep. 30, 2014 USD ($) a Farm
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm | 41 |  |  | 41 | 29
Total Acres | a | 14,880 | 14,880 | 7,641 | 14,880 | 7,641
% of Total Acres |  |  |  | 100.00% | 100.00%
Rental revenue |  | $ 3,080,240 | $ 1,771,106 | $ 8,483,023 | $ 4,828,033
% of Total Rental Revenue |  |  |  | 100.00% | 100.00%
California [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm | 18 |  |  | 18 | 11
Total Acres | a | 3,576 | 3,576 | 1,993 | 3,576 | 1,993
% of Total Acres | 24.00% |  |  | 24.00% | 26.10%
Rental revenue |  |  |  | $ 5,652,357 | $ 3,260,272
% of Total Rental Revenue |  |  |  | 66.60% | 67.50%
Florida [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm | 12 |  |  | 12 | 9
Total Acres | a | 4,401 | 4,401 | 1,304 | 4,401 | 1,304
% of Total Acres | 29.60% |  |  | 29.60% | 17.10%
Rental revenue |  |  |  | $ 1,458,433 | $ 384,861
% of Total Rental Revenue |  |  |  | 17.20% | 8.00%
Oregon [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm |  |  |  | 4 | 4
Total Acres | a | 2,313 | 2,313 | 2,313 | 2,313 | 2,313
% of Total Acres |  |  |  | 15.60% | 30.30%
Rental revenue |  |  |  | $ 876,244 | $ 775,438
% of Total Rental Revenue |  |  |  | 10.30% | 16.10%
Arizona [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm |  |  |  | 1 | 1
Total Acres | a | 1,761 | 1,761 | 1,761 | 1,761 | 1,761
% of Total Acres |  |  |  | 11.80% | 23.00%
Rental revenue |  |  |  | $ 243,953 | $ 217,899
% of Total Rental Revenue |  |  |  | 2.90% | 4.50%
Michigan [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm |  |  |  | 4 | 4
Total Acres | a | 270 | 270 | 270 | 270 | 270
% of Total Acres |  |  |  | 1.80% | 3.50%
Rental revenue |  |  |  | $ 185,036 | $ 189,563
% of Total Rental Revenue |  |  |  | 2.20% | 3.90%
Nebraska [Member] |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Farms | Farm |  |  |  | 2 |
Total Acres | a | 2,559 | 2,559 |  | 2,559 |
% of Total Acres |  |  |  | 17.20% |
Rental revenue |  |  |  | $ 67,000 |
% of Total Rental Revenue |  |  |  | 0.80% |

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