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ACCRUED LIABILITIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Accrued settlement $ 0 $ 6,750
Accrued payroll and employee benefits 1,189 759
Accrued property taxes 510 632
Accrued purchase orders 1,957 699
Other 1,646 1,302
Total accrued liabilities $ 5,302 $ 10,142
Percentage of total current liabilities 5.00%