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SUPPLEMENTAL FINANCIAL INFORMATION - Schedule of Accounts Payable and Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Accounts payable $ 2,033 $ 1,881
Payroll liabilities 1,588 1,928
Other accrued liabilities 1,817 4,112
Accounts payable and accrued liabilities $ 5,438 $ 7,921