Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Accounting Policies [Abstract]        
Cash and cash equivalents $ 4,949 $ 1,769 $ 1,326  
Restricted cash 25,680      
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows $ 30,629 $ 1,769 $ 1,326 $ 3,905