CONDENSED CONSOLIDATED STATEMENTS OF 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
Gain on sales of assets, net	$ 0	$ 77	$ 14	$ 118
Total revenues	69,411	119,304	206,272	347,299
Operating expenses
Lease operating	8,275	11,868	27,901	33,234
Gathering, processing and transportation	5,760	6,600	16,797	16,937
Production and ad valorem taxes	4,368	7,401	13,152	20,672
General and administrative	8,585	6,876	23,801	20,173
Asset Impairment Charges	235,989	0	271,498	0
Depreciation, depletion and amortization	37,038	46,519	114,891	129,687
Total operating expenses	300,015	79,264	468,040	220,703
Operating income (loss)	(230,604)	40,040	(261,768)	126,596
Other income (expense)
Interest expense	(7,497)	(8,736)	(24,213)	(27,270)
Derivatives	(6,891)	24,248	109,879	(30,166)
Other, net	21	(248)	(42)	(134)
Income (loss) before income taxes	(244,971)	55,304	(176,144)	69,026
Income tax benefit (expense)	1,558	(942)	1,110	(1,736)
Net income (loss) attributable to common shareholders	$ (243,413)	$ 54,362	$ (175,034)	$ 67,290
Net income (loss) per share:
Basic (in dollars per share)	$ (16.03)	$ 3.60	$ (11.54)	$ 4.45
Diluted (in dollars per share)	$ (16.03)	$ 3.59	$ (11.54)	$ 4.44
Weighted average shares outstanding – basic (in shares)	15,183	15,110	15,168	15,105
Weighted average shares outstanding – diluted (in shares)	15,183	15,160	15,168	15,165
Oil and Gas, Exploration and Production [Member]
Revenues
Revenues	$ 63,227	$ 110,618	$ 190,732	$ 319,461
Oil and Condensate [Member]
Revenues
Revenues	2,824	3,546	6,295	12,596
Natural Gas, Production [Member]
Revenues
Revenues	2,563	4,215	7,273	13,782
Product and Service, Other [Member]
Revenues
Revenues	$ 797	$ 848	$ 1,958	$ 1,342