Quarterly report pursuant to Section 13 or 15(d)

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

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Real Estate and Intangible Assets - Summary of Geographic Locations of Properties (Detail)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
USD ($)
a
farm
Mar. 31, 2017
USD ($)
farm
Dec. 31, 2017
a
Real Estate Properties [Line Items]      
No. of Farms | farm 75 59  
Total Acres | a 63,351   54,340
% of Total Acres 100.00% 100.00%  
Rental Revenue | $ $ 6,688 $ 5,748  
% of Total Rental Revenue 100.00% 100.00%  
California      
Real Estate Properties [Line Items]      
No. of Farms | farm 29 22  
Total Acres | a 8,241   6,713
% of Total Acres 13.00% 12.40%  
Rental Revenue | $ $ 3,028 $ 2,857  
% of Total Rental Revenue 45.30% 49.70%  
Florida      
Real Estate Properties [Line Items]      
No. of Farms | farm 16 16  
Total Acres | a 11,006   9,315
% of Total Acres 17.40% 17.10%  
Rental Revenue | $ $ 1,754 $ 1,531  
% of Total Rental Revenue 26.20% 26.60%  
Colorado      
Real Estate Properties [Line Items]      
No. of Farms | farm 10 9  
Total Acres | a 31,450   30,170
% of Total Acres 49.60% 55.50%  
Rental Revenue | $ $ 686 $ 673  
% of Total Rental Revenue 10.30% 11.70%  
Arizona      
Real Estate Properties [Line Items]      
No. of Farms | farm 6 2  
Total Acres | a 6,280   3,000
% of Total Acres 9.90% 5.50%  
Rental Revenue | $ $ 528 $ 186  
% of Total Rental Revenue 7.90% 3.20%  
Oregon      
Real Estate Properties [Line Items]      
No. of Farms | farm 4 4  
Total Acres | a 2,313   2,313
% of Total Acres 3.70% 4.30%  
Rental Revenue | $ $ 307 $ 294  
% of Total Rental Revenue 4.60% 5.10%  
Nebraska      
Real Estate Properties [Line Items]      
No. of Farms | farm 2 2  
Total Acres | a 2,559   2,559
% of Total Acres 4.00% 4.70%  
Rental Revenue | $ $ 145 $ 145  
% of Total Rental Revenue 2.20% 2.60%  
Washington      
Real Estate Properties [Line Items]      
No. of Farms | farm 1 0  
Total Acres | a 746   0
% of Total Acres 1.20% 0.00%  
Rental Revenue | $ $ 121 $ 0  
% of Total Rental Revenue 1.80% 0.00%  
Michigan      
Real Estate Properties [Line Items]      
No. of Farms | farm 5 4  
Total Acres | a 446   270
% of Total Acres 0.70% 0.50%  
Rental Revenue | $ $ 70 $ 62  
% of Total Rental Revenue 1.00% 1.10%  
North Carolina      
Real Estate Properties [Line Items]      
No. of Farms | farm 2 0  
Total Acres | a 310   0
% of Total Acres 0.50% 0.00%  
Rental Revenue | $ $ 49 $ 0  
% of Total Rental Revenue 0.70% 0.00%