ACCRUED LIABILITIES (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Accrued purchases	$ 1,377	$ 664
Accrued payroll and employee benefits	1,267	2,166
Accrued property taxes	367	748
Other	3,248	2,891
Total accrued liabilities	$ 6,259	$ 6,469