CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Natural gas sales	$ 50,437	$ 25,727	$ 91,377	$ 50,874
Oil sales	11,034	14,988	23,895	26,004
Total oil and gas sales	61,471	40,715	115,272	76,878
Operating expenses:
Production taxes	1,143	1,327	2,240	2,513
Gathering and transportation	3,545	4,025	7,673	8,390
Lease operating	9,433	12,988	19,322	25,948
Exploration				7,753
Depreciation, depletion and amortization	30,321	36,029	60,226	74,865
General and administrative	6,559	5,663	12,960	11,238
Impairment of oil and gas properties		1,742		24,460
Net loss on sale of oil and gas properties		1,647		907
Total operating expenses	51,001	63,421	102,421	156,074
Operating income (loss)	10,470	(22,706)	12,851	(79,196)
Other income (expenses):
Gain on extinguishment of debt		56,196		89,576
Gain from derivative financial instruments	5,295	18	13,155	674
Other income	65	314	228	595
Interest expense	(36,755)	(28,882)	(69,655)	(58,826)
Total other income (expenses)	(31,395)	27,646	(56,272)	32,019
Income (loss) before income taxes	(20,925)	4,940	(43,421)	(47,177)
Provision for income taxes	(517)	(88)	(952)	(4,548)
Net income (loss)	$ (21,442)	$ 4,852	$ (44,373)	$ (51,725)
Net income (loss) per share – basic and diluted	$ (1.45)	$ 0.41	$ (3.06)	$ (4.82)
Weighted average shares outstanding – basic and diluted	14,749	11,557	14,488	10,729