STATEMENTS OF CONSOLIDATED OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Total revenues	$ 202,144	$ 275,575
Costs and expenses:
Lease operating expense	119,708	123,918
Exploration	56	51
Taxes other than income	12,944	18,668
Depreciation, depletion, and amortization	40,268	55,843
Impairment expense	476,936	2,246
General and administrative expense	27,789	55,288
Accretion of asset retirement obligations	6,206	5,559
(Gain) loss on commodity derivative instruments	(60,671)	6,700
Other, net	250	798
Total costs and expenses	644,033	287,546
Operating income (loss)	(441,889)	(11,971)
Other income (expense):
Interest expense, net	(20,522)	(16,855)
Other income (expense)	65	(1,117)
Loss on lease	0	(4,247)
Inventory valuation adjustment	(1,003)	0
Total other income (expense)	(21,460)	(22,219)
Income (loss) before reorganization items, net and income taxes	(463,349)	(34,190)
Reorganization items, net	(566)	(1,057)
Income tax benefit (expense)	(115)	50
Net income (loss)	(464,030)	(35,197)
Net (income) loss allocated to participating restricted stockholders	0	0
Net income (loss) available to common stockholders	$ (464,030)	$ (35,197)
Earnings (loss) per share: (See Note 11)
Basic and diluted earnings (loss) per share	$ (12.34)	$ (1.20)
Weighted average common shares outstanding:
Basic and diluted	37,612	29,301
Oil and Natural Gas Sales [Member]
Revenues:
Total revenues	$ 200,888	$ 274,607
Other Revenues [Member]
Revenues:
Total revenues	1,256	968
Gathering, Processing and Transportation [Member]
Costs and expenses:
Gathering, processing, and transportation	$ 20,547	$ 18,475