Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.10.0.1
Subsequent Events - Additional Information (Detail)
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 30, 2018
USD ($)
Jul. 16, 2018
shares
Jul. 12, 2018
USD ($)
a
option
farm
Agreement
Jul. 10, 2018
USD ($)
a
Jun. 13, 2018
shares
Jun. 12, 2018
shares
May 11, 2018
shares
May 04, 2018
shares
Jan. 17, 2018
shares
Jan. 16, 2018
shares
Jun. 01, 2017
farm
Aug. 08, 2018
USD ($)
$ / shares
shares
Mar. 31, 2018
Jun. 30, 2018
USD ($)
a
Jun. 30, 2017
USD ($)
a
Jun. 07, 2018
a
Mar. 27, 2018
$ / shares
Mar. 13, 2018
USD ($)
Dec. 05, 2014
USD ($)
Subsequent Event [Line Items]                                      
Area of real estate property (in acres) | a                           63,325 57,930        
Number of farms acquired | farm                     2                
Lease term ( in years)                         1 year            
Annualized straight line rent                             $ 4,721,000        
Average sales price of common stock sold (in dollars per share) | $ / shares                                 $ 12.15    
Farm Credit FL                                      
Subsequent Event [Line Items]                                      
Interest rate (as percent)                           4.70%          
Total mortgage notes and bonds payable                           $ 5,727,000          
Farmer Mac Bonds Payable                                      
Subsequent Event [Line Items]                                      
Interest rate (as percent)                           2.60%          
Debt instrument, term                           3 years          
Face amount of debt                                   $ 125,000,000 $ 125,000,000
Total mortgage notes and bonds payable                                   $ 85,551,000  
Subsequent event | Farm Credit FL                                      
Subsequent Event [Line Items]                                      
Number of loan agreements | Agreement     2                                
Proceeds from notes payable     $ 22,400,000                                
Interest rate (as percent)     5.38%                                
Fees and commissions     $ 28,000                                
Subsequent event | Farmer Mac Bonds Payable                                      
Subsequent Event [Line Items]                                      
Interest rate (as percent) 4.45%                                    
Fees and commissions $ 13,000                                    
Debt instrument, term 7 years                                    
Face amount of debt $ 10,400,000                                    
Total mortgage notes and bonds payable                       $ 9,400,000              
Proceeds from Issuance of Debt $ 1,000,000                                    
Morrow County Oregon | Subsequent event                                      
Subsequent Event [Line Items]                                      
Area of real estate property (in acres) | a       1,895                              
Proceeds from sale of real estate       $ 20,500,000                              
Gain on sale of properties       $ 6,700,000                              
Florida                                      
Subsequent Event [Line Items]                                      
Area of real estate property (in acres) | a                           10,980 9,315 26      
Owl Hammock | Florida | Subsequent event                                      
Subsequent Event [Line Items]                                      
Area of real estate property (in acres) | a     5,630                                
Number of farms acquired | farm     5                                
Total Purchase Price     $ 37,400,000                                
Lease term ( in years)     7 years                                
Number of renewal options | option     2                                
Renewal term     5 years                                
Annualized straight line rent     $ 2,100,000                                
Series B Preferred Stock | Subsequent event                                      
Subsequent Event [Line Items]                                      
Fees and commissions                       $ 224,000              
Sale of stock sold under sale agreement (in shares) | shares                       89,419              
Proceeds from issuance of preferred stock                       $ 2,200,000              
Net proceeds from issuance of stock                       $ 2,000,000              
Common Stock | Subsequent event                                      
Subsequent Event [Line Items]                                      
Sale of stock sold under sale agreement (in shares) | shares                       200              
Net proceeds from issuance of stock                       $ 3,000              
Average sales price of common stock sold (in dollars per share) | $ / shares                       $ 12.75              
Limited Partner                                      
Subsequent Event [Line Items]                                      
OP units redeemed for common stock (in shares) | shares         233,952   9,615   7,700                    
Limited Partner | Subsequent event                                      
Subsequent Event [Line Items]                                      
OP units redeemed for common stock (in shares) | shares   46,544                                  
Gladstone Land Limited Partnership | Limited Partner                                      
Subsequent Event [Line Items]                                      
OP units redeemed (in shares) | shares           233,952   19,230   37,500                  
Common stock issued (in shares) | shares         233,952   9,615   7,700                    
Gladstone Land Limited Partnership | Limited Partner | Subsequent event                                      
Subsequent Event [Line Items]                                      
OP units redeemed (in shares) | shares   46,544                                  
Common stock issued (in shares) | shares   46,544