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Real Estate and Intangible Assets - Summary of Geographic Locations, by State, of Properties (Detail)

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Real Estate and Intangible Assets - Summary of Geographic Locations, by State, of Properties (Detail)
 3 Months Ended 9 Months Ended
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%