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RELATED PARTY TRANSACTIONS - Additional Information (Details)
$ / shares in Units, $ in Thousands
6 Months Ended 12 Months Ended
Feb. 11, 2020
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Feb. 12, 2020
$ / shares
Related Party Transaction [Line Items]            
Equity interests (in usd per share) | $ / shares           $ 1.00
Ratio of percentage of stockholders' equity paid up to predetermined amount 0.000875          
Predetermined amount of stockholders equity used in calculating monthly management fee $ 17,280,000          
Ratio of percentage of stockholders' equity paid over predetermined amount 0.0075          
Compensation and management fee   $ 77,900 $ 131,685 $ 170,628 $ 179,841  
Management Agreement            
Related Party Transaction [Line Items]            
Reimbursement payments     14,200 21,400    
Management fee payable     $ 0 $ 15,800