Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	May 31, 2018	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2017
Financial Designation, Predecessor and Successor [Fixed List]	Predecessor	Successor	Successor	Predecessor
Revenues:
Total revenues	$ 111,031	$ 138,600	$ 113,820	$ 225,693
Operating costs and expenses:
Lease operating expenses	45,372	64,100	77,798	101,591
Cost of purchased natural gas	557	1,026	1,043	1,699
Dry hole and exploration costs	122	177	75	413
Production taxes	5,343	6,482	5,593	10,588
Accretion expense on obligations	3,176	5,420	8,112	7,653
Depreciation, depletion and amortization	46,196	16,012	11,666	96,901
General and administrative expenses	15,648	15,626	26,782	32,290
Restructuring costs	5,211
Impairment of oil and natural gas properties	3	3,065	129,082	93,607
(Gain) loss on sales of oil and natural gas properties	5	(697)	(318)	(981)
Total operating costs and expenses	121,633	111,211	259,833	343,761
Operating income (loss)	(10,602)	27,389	(146,013)	(118,068)
Other income (expense), net:
Gain on derivatives, net	444	16,962	3,058	22,854
Interest expense	(13,652)	(7,225)	(3,489)	(40,903)
Gain (loss) on equity securities		(11,130)	4,593
Other income, net	776	374	3,523	1,706
Total other income (expense), net	(12,432)	(1,019)	7,685	(16,343)
Reorganization items, net	(587,325)	(2,323)
Income (loss) before income taxes	(610,359)	24,047	(138,328)	(134,411)
Income tax benefit (expense)	(166)	(78)	13	210
Net income (loss)	$ (610,525)	$ 23,969	$ (138,315)	$ (134,201)
Basic and diluted earnings per share:
Net income (loss)	$ (12.12)	$ 2.39	$ (13.69)	$ (2.66)
Weighted average common shares / units outstanding:
Basic, share/unit	49,369	10,030	10,105	49,357
Diluted, share/unit	49,369	10,032	10,105	49,357
Oil, natural gas and natural gas liquids revenues
Revenues:
Total revenues	$ 110,307	$ 137,169	$ 112,419	$ 223,297
Transportation and marketing–related revenues
Revenues:
Total revenues	$ 724	$ 1,431	$ 1,401	$ 2,396