Annual report pursuant to Section 13 and 15(d)

SUPPLEMENTAL DISCLOSURES ABOUT NATURAL GAS PRODUCING ACTIVITIES - Results of Operations for Natural Gas & Condensate Producing Activities (Details)

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SUPPLEMENTAL DISCLOSURES ABOUT NATURAL GAS PRODUCING ACTIVITIES - Results of Operations for Natural Gas & Condensate Producing Activities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Extractive Industries [Abstract]      
Natural gas sales $ 28,774 $ 4,423 $ 503
Operating costs 14,923 11,251 1,668
Depreciation, depletion and amortization 19,736 1,228 115
Impairment charge 0 2,699 0
Total operating costs and expenses 34,659 15,178 1,783
Results of operations $ (5,885) $ (10,755) $ (1,280)