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Supplemental Information On Oil And Natural Gas Producing Activities (Capitalized Costs) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Supplemental Information On Oil And Natural Gas Producing Activities    
Proved property $ 112,476 $ 112,173
Less: accumulated depreciation, depletion, amortization and impairments (69,541) (65,647)
Oil and natural gas properties and equipment, net $ 42,935 $ 46,526