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EQUITY-METHOD INVESTMENT (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]          
Percentage of production offtake     66.66%    
Percentage of operating expenses to be absorbed     66.66%    
St. Gabriel CC Company, LLC [Member]          
Schedule of Equity Method Investments [Line Items]          
Ownership percentage in joint venture 66.66%   66.66%    
Loss relating to joint venture's expenses $ 136 $ 0 $ 270 $ 0  
Carrying value of joint venture $ 5,080   $ 5,080   $ 4,553
St. Gabriel CC Company, LLC [Member] | Eastman Chemical Company [Member]          
Schedule of Equity Method Investments [Line Items]          
Ownership percentage in joint venture 33.34%   33.34%