Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Additional Information (Details)

v3.19.3
Related-Party Transactions - Additional Information (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Jan. 10, 2018
Sep. 30, 2019
USD ($)
a
Sep. 30, 2018
USD ($)
a
Sep. 30, 2019
USD ($)
a
officer
Sep. 30, 2018
USD ($)
a
Aug. 01, 2018
Jul. 31, 2018
a
Oct. 17, 2017
USD ($)
a
Related Party Transaction [Line Items]                
Number of executive officers that serve as directors | officer       2        
Management fee (as percent)   2.00%            
Base management fee, quarterly (as percent)   0.50%            
Hurdle rate, quarterly (as percent)       1.75%        
Hurdle rate, annual (as percent)       7.00%        
Pre-Incentive Fee FFO (as percent)       100.00%        
Pre-Incentive Fee, exceeded (as percent)       2.1875%        
Pre-Incentive Fee, exceeded, annual (as percent)       8.75%        
Pre-Incentive Fee (as percent)       20.00%        
Cumulative realized capital gains (as percent)       15.00%        
Area of real estate property (in acres) | a   81,586 67,826 81,586 67,826      
Base management fee   $ 862 $ 690 $ 2,741 $ 2,102      
Administration fee   311 387 866 935      
Selling commissions and dealer-manager fees   $ 1,657 890 $ 4,781 940      
Selling commissions and dealer-manager fees, paid to third parties to date, percentage   93.90%   93.90%        
Gladstone Securities                
Related Party Transaction [Line Items]                
Administration fee   $ 160 57 $ 188 59      
Financing fee (as percent)       0.14%        
Taxable REIT Subsidiary                
Related Party Transaction [Line Items]                
Administration fee     18   48      
Preferred Stock | Series B Preferred Stock                
Related Party Transaction [Line Items]                
Selling commission fee (as percent) 7.00%              
Dealer-manager fee (as percent) 3.00%              
Ventura County California                
Related Party Transaction [Line Items]                
Area of real estate property (in acres) | a             169 169
Operating lease, term (in years)           10 years    
Land Advisers | Taxable REIT Subsidiary                
Related Party Transaction [Line Items]                
Base management fee     15   176      
Land Advisers | Unsecured Debt                
Related Party Transaction [Line Items]                
Face amount of debt               $ 1,700
Stated interest rate (as percent)               5.00%
Gladstone Securities | Preferred Stock | Series B Preferred Stock                
Related Party Transaction [Line Items]                
Selling commissions and dealer-manager fees   1,800 890 $ 5,100 940      
Payment of management fees   $ 1,700 $ 843 $ 4,800 $ 890      
Gladstone Securities | Minimum | Gladstone Securities                
Related Party Transaction [Line Items]                
Financing fee (as percent)       0.50%        
Gladstone Securities | Maximum | Gladstone Securities                
Related Party Transaction [Line Items]                
Financing fee (as percent)       1.00%