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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
tenant
class_of_stock
shares
Jun. 30, 2019
shares
Jun. 30, 2020
USD ($)
tenant
class_of_stock
shares
Jun. 30, 2019
USD ($)
shares
Dec. 31, 2019
USD ($)
Class of Stock [Line Items]          
Impairment losses     $ 0 $ 0  
Asset held for sale $ 0   0   $ 0
Lease-related receivable write-off     $ 0 $ 0  
Classes of common stock | class_of_stock 2   2    
Weighted average number diluted shares outstanding adjustment (in shares) | shares 0 0 0 0  
Percent of rent collected 100.00%   100.00%    
Number of tenants | tenant 2   2    
Buildings          
Class of Stock [Line Items]          
Acquired real estate asset, useful life (in years)     40 years    
Site improvements          
Class of Stock [Line Items]          
Acquired real estate asset, useful life (in years)     15 years