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EQUITY-METHOD INVESTMENT (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) vote	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Equity Method Investment, Summarized Financial Information [Abstract]
Percentage of operating expenses to be absorbed			66.66%
Percentage of production offtake			66.66%
St. Gabriel CC Company, LLC
Equity Method Investment, Summarized Financial Information [Abstract]
Ownership percentage in joint venture	66.66%		66.66%
Number of votes | vote			2
Loss relating to joint venture's expenses	$ 130	$ 142	$ 274	$ 280
Net return of capital	(28)		(15)
Capital contribution to investment		$ 131		$ 798
Carrying value of joint venture	$ 4,682		$ 4,682		$ 4,971
St. Gabriel CC Company, LLC | Eastman Chemical Company
Equity Method Investment, Summarized Financial Information [Abstract]
Ownership percentage in joint venture	33.34%		33.34%
Number of votes | vote			2

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