Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Additional Information (Detail)

v3.5.0.2
Borrowings - Additional Information (Detail) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 13, 2016
Oct. 05, 2016
Jul. 01, 2016
Mar. 03, 2016
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Aug. 22, 2016
Apr. 04, 2016
Sep. 03, 2015
Dec. 05, 2014
Debt Instrument [Line Items]                          
Debt Instrument Weighted Average Interest Rate         3.29% 3.41% 3.08% 3.51%          
Note payable, outstanding         $ 190,379,624   $ 190,379,624   $ 141,678,935        
Long-term Debt, Gross         191,480,127   191,480,127   142,733,157        
Borrowings under line of credit         $ 22,500,000   $ 22,500,000   $ 100,000        
Two Thousand Sixteen MetLife Term Note [Member]                          
Debt Instrument [Line Items]                          
Loans to value ratios percentage             58.00%            
Two Thousand Fifteen MetLife Term Note [Member]                          
Debt Instrument [Line Items]                          
Debt instrument, fixed interest rate         3.35%   3.35%            
Farmer Mac Bonds Payable [Member]                          
Debt Instrument [Line Items]                          
Amount         $ 125,000,000   $ 125,000,000     $ 1,020,000     $ 75,000,000
Debt instrument, fixed interest rate         2.94%   2.94%   2.87% 2.87%      
Undrawn Commitment         $ 74,743,000   $ 74,743,000   $ 41,294,000        
Remaining borrowing capacity         0   0            
Long-term Debt, Gross         49,777,500   $ 49,777,500   $ 33,706,000        
Farmer Mac Bonds Payable [Member] | Minimum [Member]                          
Debt Instrument [Line Items]                          
Maturity Date             Dec. 22, 2016            
MetLife Mortgage Notes Payable [Member]                          
Debt Instrument [Line Items]                          
Amount         $ 100,000,000   $ 100,000,000            
Maturity Date             Jan. 05, 2029            
Debt instrument, fixed interest rate         3.35%   3.35%   3.35%        
Undrawn Commitment         $ 12,529,806   $ 12,529,806   $ 12,529,806        
Remaining borrowing capacity         600,000   600,000            
Long-term Debt, Gross         85,939,466   85,939,466   $ 87,470,194        
MetLife Line of Credit [Member]                          
Debt Instrument [Line Items]                          
Amount         $ 25,000,000   $ 25,000,000            
Maturity Date             Apr. 05, 2024            
Debt instrument, fixed interest rate         2.90%   2.90%   2.58%        
Undrawn Commitment         $ 2,500,000   $ 2,500,000   $ 24,900,000        
Long-term Debt, Gross         22,500,000   22,500,000   $ 100,000        
Farm Credit CFL Mortgage Notes Payable [Member]                          
Debt Instrument [Line Items]                          
Amount         $ 34,587,880   $ 34,587,880            
Reduced stated interest rate                 16.10%        
Debt instrument, fixed interest rate         3.50%   3.50%   3.42%        
Undrawn Commitment         $ 0   $ 0   $ 0        
Long-term Debt, Gross         33,263,161   $ 33,263,161   $ 21,456,963        
Farm Credit CFL Mortgage Notes Payable [Member] | Minimum [Member]                          
Debt Instrument [Line Items]                          
Maturity Date             Oct. 01, 2016            
Farm Credit West Note Payable [Member]                          
Debt Instrument [Line Items]                          
Debt Instrument Weighted Average Interest Rate             3.54%            
Amount                     $ 9,282,000    
Debt instrument, fixed interest rate                     3.54%    
Total borrowings from credit notes payable         $ 9,300,000   $ 9,300,000            
Debt term             24 years 6 months            
MetLife Facility [Member]                          
Debt Instrument [Line Items]                          
Period for interest rate adjustment             5 years            
Expiration date of commitment             Dec. 31, 2017            
Minimum annualized rate             2.50%            
Debt Instrument Commitment Fee Percentage         0.20%   0.20%         0.20%  
Farm Credit Central Florida Notes Payable [Member]                          
Debt Instrument [Line Items]                          
Debt Instrument Weighted Average Interest Rate             3.49%            
Amount     $ 3,120,000                    
Debt instrument, fixed interest rate     3.78%                    
Total borrowings from credit notes payable         $ 24,000,000   $ 24,000,000            
Debt term     36 years                    
Mortgage Note Payable [Member] | Long-Term Mortgage Notes and Bonds Payable [Member]                          
Debt Instrument [Line Items]                          
Aggregate fair value of mortgage notes payable outstanding         170,100,000   170,100,000            
Mortgage notes payable, carrying value         167,000,000   167,000,000            
Mortgage Note Payable [Member] | Short-Term Mortgage Notes and Bonds Payable [Member]                          
Debt Instrument [Line Items]                          
Mortgage notes payable, carrying value         1,900,000   1,900,000            
Borrowings under line of credit         $ 22,500,000   $ 22,500,000            
3.08% Fixed Interest Rate Bond [Member] | Farmer Mac Bonds Payable [Member]                          
Debt Instrument [Line Items]                          
Amount       $ 11,100,000                  
Debt instrument, fixed interest rate       3.08%                  
2.98% Fixed Interest Rate Bond [Member] | Farmer Mac Bonds Payable [Member]                          
Debt Instrument [Line Items]                          
Amount       $ 4,431,000                  
Debt instrument, fixed interest rate       2.98%                  
Debt term       9 years 8 months 12 days                  
London Interbank Offered Rate (LIBOR) [Member] | MetLife Facility [Member]                          
Debt Instrument [Line Items]                          
Percentage added to LIBOR             2.25%            
Subsequent Event [Member]                          
Debt Instrument [Line Items]                          
Debt instrument, fee amount   $ 225,000                      
Subsequent Event [Member] | Two Thousand Sixteen MetLife Term Note [Member]                          
Debt Instrument [Line Items]                          
Note payable, outstanding   $ 21,600,000.0                      
Loans to value ratios percentage   60.00%                      
Line of credit facility, unused capacity, commitment fee percentage   0.20%                      
Line of credit, carrying value   $ 50,000,000                      
Subsequent Event [Member] | Two Thousand Sixteen MetLife Line of Credit [Member]                          
Debt Instrument [Line Items]                          
Line of credit, carrying value   $ 25,000,000                      
Subsequent Event [Member] | Two Thousand Fifteen MetLife Term Note [Member]                          
Debt Instrument [Line Items]                          
Debt instrument, fixed interest rate   3.16%                      
Subsequent Event [Member] | MetLife Line of Credit [Member]                          
Debt Instrument [Line Items]                          
Repayments of long-term debt   $ 21,000,000                      
Subsequent Event [Member] | Farm Credit CFL Mortgage Notes Payable [Member]                          
Debt Instrument [Line Items]                          
Maturity Date Nov. 01, 2041                        
Debt instrument, fixed interest rate 3.94%                        
Repayment of loans $ 3,900,000                        
Subsequent Event [Member] | London Interbank Offered Rate (LIBOR) [Member] | Two Thousand Sixteen MetLife Line of Credit [Member]                          
Debt Instrument [Line Items]                          
Percentage added to LIBOR   2.25%                      
Line of credit facility, unused capacity, commitment fee percentage   0.20%                      
Subsequent Event [Member] | London Interbank Offered Rate (LIBOR) [Member] | Two Thousand Sixteen MetLife Line of Credit [Member] | Minimum [Member]                          
Debt Instrument [Line Items]                          
Debt instrument, fixed interest rate   2.50%