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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent Adopted Accounting Standards - Additional Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Jan. 01, 2019
Operating Lease, Right-of-Use Asset $ 2,860  
Operating Lease, Liability 2,959  
ASU 2016-02    
Operating Lease, Right-of-Use Asset $ 2,410 $ 2,410
Operating Lease, Liability   $ 2,300