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Asset Retirement Obligations - Schedule of Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract]    
Balance, beginning of year $ 1,408 $ 819
Accretion 19 43
Sold/Plugged (12)
Acquired 44 558
Balance, end of period $ 1,471 $ 1,408