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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
COMMITMENTS AND CONTINGENCIES [Line Items]    
Tenant reimbursements $ 189,136 $ 60,598
Restricted cash $ 2,410,951 129,118
Maximum    
COMMITMENTS AND CONTINGENCIES [Line Items]    
Shares authorized to be repurchased per month (as a percent) 2.00%  
Shares authorized to be repurchased per quarter (as a percent) 5.00%  
Building Improvements, Tenant Improvements And Leasing Commissions    
COMMITMENTS AND CONTINGENCIES [Line Items]    
Restricted cash $ 2,271,462 $ 92,684