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Asset Retirement Obligations - Schedule of Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Asset Retirement Obligation Disclosure [Abstract]    
Balance, beginning of year $ 939 $ 913
Accretion 22 25
Sold/Plugged (130) (18)
New drilled wells 2 19
Change in discount rate (14)
Liabilities incurred
Balance, end of year $ 819 $ 939