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Asset Retirement Obligations Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]        
Asset Retirement Obligation $ 6,169   $ 6,050 $ 4,974
Accretion expense 99 $ 75 306  
Liabilities incurred for new wells and facilities construction 29   1,120  
Reductions due to plugged wells and facilities (9)   (192)  
Revisions in estimates     (158)  
Asset retirement obligation - current portion $ 526   $ 524