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Supplemental Oil and Natural Gas Information (Unaudited) - Schedule of Capitalized Costs Associated with Oil and Natural Gas Producing Activities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Oil and Gas Exploration and Production Industries Disclosures [Abstract]    
Unevaluated properties: Unproved leasehold costs $ 1,597 $ 3,741
Evaluated properties Evaluated properties in full cost pool 93,549 89,113
Less accumulated depreciation, depletion and amortization (87,708) (84,400)
Net oil and natural gas properties $ 7,438 $ 8,454