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Asset Retirement Obligations - Schedule of Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]    
Balance, beginning of year $ 819 $ 939
Accretion 43 22
Sold/Plugged (12) (130)
Acquired 558 2
Revisions (14)
Liabilities incurred
Balance, end of period $ 1,408 $ 819