Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Details)

v3.10.0.1
Subsequent Events - Additional Information (Details)
$ / shares in Units, $ in Thousands
 2 Months Ended 12 Months Ended
Feb. 07, 2019
USD ($)
Jan. 22, 2019
USD ($)
a
option
Feb. 25, 2019
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
a
shares
Dec. 31, 2017
USD ($)
a
shares
Subsequent Event [Line Items]          
Total Acres | a       73,205 63,014
Financing fee       $ 83 $ 36
Base management fee       2,837 2,041
Payment of management fees         0
Redemption of preferred stock       523 $ 2,569
695-acre farm in Lincoln County, Nebraska | Subsequent Event          
Subsequent Event [Line Items]          
Total Acres | a   695      
Purchase price   $ 2,400      
Lease term (in years)   5 years      
Number of renewal options | option   1      
Rental revenue   $ 126      
Farm Credit West Note Payable due 2043 | Subsequent Event          
Subsequent Event [Line Items]          
Proceeds from notes payable $ 1,400        
Interest rate (as percent) 5.45%        
Debt Financing Costs | Gladstone Securities | Farm Credit West Note Payable due 2043 | Subsequent Event          
Subsequent Event [Line Items]          
Financing fee $ 2        
Series B Preferred Stock | Subsequent Event          
Subsequent Event [Line Items]          
Sale of stock sold under sale agreement (in shares) | shares     454,075    
Proceeds from issuance and preferred stock     $ 11,200    
Net proceeds from issuance of stock     $ 10,200    
Redemption of preferred stock (in shares) | shares     600    
Redemption price of preferred stock (in dollars per share) | $ / shares     $ 22.5    
Redemption of preferred stock     $ 14    
Series B Preferred Stock | Sales Commissions and Broker-Dealer Fees | Gladstone Securities | Subsequent Event          
Subsequent Event [Line Items]          
Base management fee     1,000    
Gladstone Securities          
Subsequent Event [Line Items]          
Payment of management fees       $ 2,200  
Gladstone Securities | Series B Preferred Stock | Sales Commissions and Broker-Dealer Fees | Subsequent Event          
Subsequent Event [Line Items]          
Payment of management fees     $ 954    
Limited Partner | Gladstone Land Limited Partnership          
Subsequent Event [Line Items]          
OP units tendered for redemption (in shares) | shares       437,226 441,153
Limited Partner | Gladstone Land Limited Partnership | Subsequent Event          
Subsequent Event [Line Items]          
OP units tendered for redemption (in shares) | shares     168,079