Quarterly report pursuant to Section 13 or 15(d)

EQUITY - Additional Information (Details)

v3.21.2
EQUITY - Additional Information (Details)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 18 Months Ended
Apr. 03, 2020
$ / shares
shares
Apr. 01, 2020
USD ($)
security
Jan. 31, 2021
USD ($)
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
shares
Dec. 31, 2020
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
shares
May 18, 2021
USD ($)
May 12, 2020
USD ($)
Subsidiary, Sale of Stock [Line Items]                      
Proceeds from issuance of preferred and common equity | $           $ 161,318,000 $ 55,231,000        
Common stock, shares issued (in shares)       32,043,989   32,043,989   26,219,019 32,043,989    
2020 Registration Statement                      
Subsidiary, Sale of Stock [Line Items]                      
Securities allowed for issuance | $   $ 1,000,000,000                  
Maximum number of securities that can be sold | security   2                  
Common Stock                      
Subsidiary, Sale of Stock [Line Items]                      
Redemptions of Series B Preferred Stock (in shares)         (144,151)   (288,303)        
Common Stock | 2020 Registration Statement                      
Subsidiary, Sale of Stock [Line Items]                      
Proceeds from issuance of preferred and common equity | $                 $ 191,200,000    
Common stock, shares issued (in shares)       10,409,228   10,409,228     10,409,228    
Shares of common stock issued (in shares)                 288,303    
Series C Preferred Stock                      
Subsidiary, Sale of Stock [Line Items]                      
Preferred stock, shares issued (in shares)       2,600,604   2,600,604   1,088,435 2,600,604    
Preferred stock, par value (in dollars per share) | $ / shares       $ 0.001   $ 0.001   $ 0.001 $ 0.001    
Preferred stock, shares authorized (in shares)       25,989,942   25,989,942   25,999,862 25,989,942    
Redemptions of Series B Preferred Stock (in shares)       9,920   9,920          
Payments for repurchase of redeemable preferred stock | $       $ 248,000   $ 248,000          
Series C Preferred Stock | 2020 Registration Statement                      
Subsidiary, Sale of Stock [Line Items]                      
Preferred stock, shares issued (in shares)       2,610,662   2,610,662     2,610,662    
Series C Preferred Stock | Preferred Stock                      
Subsidiary, Sale of Stock [Line Items]                      
Maximum amount of securities can be sold under shelf registration statement (in shares) 26,000,000                    
Dividend rate 6.00%                    
Preferred stock, par value (in dollars per share) | $ / shares $ 0.001                    
Preferred stock, shares authorized (in shares) 20,000,000                    
Average sales price of common stock sold (in dollars per share) | $ / shares $ 25.00                    
Preferred stock, shares authorized, pursuant to DRIP (in shares) 6,000,000                    
Sale of stock pursuant to DRIP (in dollars per share) | $ / shares $ 22.75                    
Redemptions of Series B Preferred Stock (in shares)       9,920   9,920          
Net proceeds from issuance of stock, excluding selling commissions and dealer-manager fees | $           $ 604,000          
Series C Preferred Stock | Preferred Stock | 2020 Registration Statement                      
Subsidiary, Sale of Stock [Line Items]                      
Proceeds from issuance of preferred and common equity | $                 $ 64,800,000    
Series C Preferred Stock | Preferred Stock | Series C Termination                      
Subsidiary, Sale of Stock [Line Items]                      
Preferred stock, shares authorized (in shares) 20,000,000                    
Series D Preferred Stock                      
Subsidiary, Sale of Stock [Line Items]                      
Preferred stock, shares issued (in shares)     2,415,000 2,415,000   2,415,000   0 2,415,000    
Dividend rate     5.00%                
Preferred stock, par value (in dollars per share) | $ / shares     $ 0.001 $ 0.001   $ 0.001   $ 0.001 $ 0.001    
Preferred stock, shares authorized (in shares)       3,600,000   3,600,000   0 3,600,000    
Series D Preferred Stock | Preferred Stock                      
Subsidiary, Sale of Stock [Line Items]                      
Proceeds from issuance of preferred and common equity | $     $ 58,300,000                
Series D Preferred Stock | Preferred Stock | 2020 Registration Statement                      
Subsidiary, Sale of Stock [Line Items]                      
Preferred stock, shares issued (in shares)       2,415,000   2,415,000     2,415,000    
Proceeds from issuance of preferred and common equity | $                 $ 60,400,000    
Common Stock | ATM Program                      
Subsidiary, Sale of Stock [Line Items]                      
Common stock, value authorized | $                   $ 260,000,000 $ 100,000,000
Common stock, additional value authorized | $                   $ 160,000,000  
OP Unit Holder                      
Subsidiary, Sale of Stock [Line Items]                      
Company's ownership       99.40%   99.40%   100.00% 99.40%    
Minimum period required to exercise, in months           12 months          
Gladstone Land Limited Partnership                      
Subsidiary, Sale of Stock [Line Items]                      
OP units held by non-controlling limited partners (in shares)           204,778   0