UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Total revenues	$ 52,745	$ 72,959	$ 146,052	$ 197,646
Costs and expenses:
Lease operating expense	27,639	32,977	91,190	88,179
Exploration	5	3	24	24
Taxes other than income	3,761	5,135	9,942	13,008
Depreciation, depletion and amortization	7,950	15,617	31,129	39,696
Impairment expense	0	0	455,031	0
General and administrative expense	6,443	27,034	21,551	46,908
Accretion of asset retirement obligations	1,565	1,428	4,617	4,071
(Gain) loss on commodity derivative instruments	14,352	(28,725)	(74,196)	(19,231)
Other, net	113	224	113	401
Total costs and expenses	67,084	58,152	554,399	186,563
Operating income (loss)	(14,339)	14,807	(408,347)	11,083
Other income (expense):
Interest expense, net	(3,362)	(5,276)	(17,218)	(13,787)
Loss on lease	0	(4,237)	0	(4,237)
Other income (expense)	196	(104)	(38)	(104)
Total other income (expense)	(3,166)	(9,617)	(17,256)	(18,128)
Income (loss) before reorganization items, net and income taxes	(17,505)	5,190	(425,603)	(7,045)
Reorganization items, net	(180)	(33)	(532)	(684)
Income tax benefit (expense)	0	0	(85)	50
Net income (loss)	(17,685)	5,157	(426,220)	(7,679)
Net (income) loss allocated to participating restricted stockholders	0	(128)	0	0
Net income (loss) attributable to common stockholders	$ (17,685)	$ 5,029	$ (426,220)	$ (7,679)
Earnings per share: (See Note 10)
Basic and diluted earnings per share	$ (0.47)	$ 0.15	$ (11.34)	$ (0.29)
Weighted average common shares outstanding:
Basic and diluted	37,626	33,707	37,596	26,093
Oil and Natural Gas Sales [Member]
Revenues:
Total revenues	$ 52,488	$ 72,426	$ 145,163	$ 196,978
Other Revenues [Member]
Revenues:
Total revenues	257	533	889	668
Gathering, Processing and Transportation [Member]
Costs and expenses:
Gathering, processing and transportation	$ 5,256	$ 4,459	$ 14,998	$ 13,507