Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

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Commitments and Contingencies - Additional Information (Detail)
 1 Months Ended 3 Months Ended 5 Months Ended 12 Months Ended 17 Months Ended 19 Months Ended 25 Months Ended 44 Months Ended 89 Months Ended
Jun. 01, 2017
farm
Jul. 31, 2018
USD ($)
a
May 31, 2018
USD ($)
Aug. 31, 2017
USD ($)
a
Jun. 30, 2017
farm
Mar. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
a
Dec. 31, 2017
USD ($)
a
Dec. 31, 2018
USD ($)
a
Dec. 31, 2018
USD ($)
a
Jun. 30, 2019
USD ($)
Dec. 31, 2020
USD ($)
Sep. 30, 2024
Jun. 07, 2018
a
May 31, 2017
farm
Loss Contingencies [Line Items]                                
Estimated cost               $ 22,605,000 $ 5,211,000              
Number of farms acquired | farm 2                              
Total Acres | a               73,205 63,014 73,205 73,205          
2017 New Real Estate Activity                                
Loss Contingencies [Line Items]                                
Total Acres | a                 12,641              
2018 New Real Estate Activity                                
Loss Contingencies [Line Items]                                
Total Acres | a               12,114   12,114 12,114          
Oregon                                
Loss Contingencies [Line Items]                                
Number of farms in lease amendment | farm                               1
Accrued liabilities related to lease               $ 921,000   $ 921,000 $ 921,000          
Total Acres | a               418 2,313 418 418          
Oregon | Forecast                                
Loss Contingencies [Line Items]                                
Estimated cost                         $ 1,800,000      
Annual rent escalation (as percent)                           6.50%    
Oregon | 2018 New Real Estate Activity                                
Loss Contingencies [Line Items]                                
Estimated cost     $ 250,000                          
Expended or accrued for capital improvements             $ 30,000                  
North Carolina                                
Loss Contingencies [Line Items]                                
Number of farms acquired | farm         2                      
Expended or accrued for capital improvements                     $ 166,000          
Total Acres | a               310 310 310 310          
North Carolina | Forecast                                
Loss Contingencies [Line Items]                                
Estimated cost                       $ 300,000        
Florida                                
Loss Contingencies [Line Items]                                
Total Acres | a               17,184 11,006 17,184 17,184       26  
Florida | 2017 New Real Estate Activity                                
Loss Contingencies [Line Items]                                
Expended or accrued for capital improvements           $ 748,000                    
Collier & Hendry, FL | 2018 New Real Estate Activity | Owl Hammock                                
Loss Contingencies [Line Items]                                
Estimated cost   $ 2,000,000                            
Total Acres | a   5,630           5,630   5,630 5,630          
California                                
Loss Contingencies [Line Items]                                
Annual rent escalation (as percent)       6.00%                        
Expended or accrued for capital improvements                   $ 1,500,000            
Total Acres | a               10,147 8,080 10,147 10,147          
Santa Barbara, CA | 2017 New Real Estate Activity | Cat Canyon Road                                
Loss Contingencies [Line Items]                                
Estimated cost       $ 4,000,000                        
Total Acres | a       361         361