Annual report pursuant to Section 13 and 15(d)

SUPPLEMENTAL DISCLOSURES ABOUT NATURAL GAS PRODUCING ACTIVITIES - Capitalized Costs Related to Natural Gas Producing Activities (Details)

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SUPPLEMENTAL DISCLOSURES ABOUT NATURAL GAS PRODUCING ACTIVITIES - Capitalized Costs Related to Natural Gas Producing Activities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Extractive Industries [Abstract]      
Proved properties $ 142,494 $ 101,459 $ 90,869
Unproved properties 0 10,204 13,000
Gross capitalized costs 142,494 111,663 103,869
Accumulated DD&A (21,010) (1,335) (149)
Net capitalized costs $ 121,484 $ 110,328 $ 103,720