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ASSET RETIREMENT OBLIGATIONS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Activity related to ARO liability    
Liability for asset retirement obligations at the beginning of the period $ 10,583 $ 10,590
Liabilities settled and divested   (1,132)
Additions 111 488
Accretion expense 477 585
Revisions in estimated cash flows 725 52
Liability for asset retirement obligations at the end of the period $ 11,896 $ 10,583