CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Gain on sales of assets, net	$ 8	$ 16	$ 14	$ 41
Total revenues	45,482	122,767	136,861	227,995
Operating expenses
Lease operating	9,094	10,362	19,626	21,366
Gathering, processing and transportation	5,593	6,408	11,037	10,337
Production and ad valorem taxes	2,630	7,579	8,784	13,271
General and administrative	7,986	6,232	15,216	13,297
Asset Impairment Charges	35,509	0	35,509	0
Depreciation, depletion and amortization	37,135	44,298	77,853	83,168
Total operating expenses	97,947	74,879	168,025	141,439
Operating income (loss)	(52,465)	47,888	(31,164)	86,556
Other income (expense)
Interest expense	(8,536)	(9,056)	(16,716)	(18,534)
Derivatives	(34,349)	13,603	116,770	(54,414)
Other, net	(55)	8	(63)	114
Income (loss) before income taxes	(95,405)	52,443	68,827	13,722
Income tax benefit (expense)	690	(818)	(448)	(794)
Net income (loss) attributable to common shareholders	$ (94,715)	$ 51,625	$ 68,379	$ 12,928
Net income (loss) per share:
Basic (in dollars per share)	$ (6.24)	$ 3.42	$ 4.51	$ 0.86
Diluted (in dollars per share)	$ (6.24)	$ 3.40	$ 4.48	$ 0.85
Weighted average shares outstanding – basic (in shares)	15,167	15,106	15,159	15,102
Weighted average shares outstanding – diluted (in shares)	15,167	15,162	15,268	15,174
Oil and Gas, Exploration and Production [Member]
Revenues
Revenues	$ 41,197	$ 114,031	$ 127,505	$ 208,843
Oil and Condensate [Member]
Revenues
Revenues	1,578	3,502	3,471	9,050
Natural Gas, Production [Member]
Revenues
Revenues	2,020	5,290	4,710	9,567
Product and Service, Other [Member]
Revenues
Revenues	$ 679	$ (72)	$ 1,161	$ 494