Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
REVENUES
Natural gas, oil and natural gas liquids sales	$ 91,549,000	$ 54,351,000	$ 277,174,000	$ 140,740,000
Brokered natural gas and marketing revenue		128,000	2,428,000	10,411,000
Total revenues	91,549,000	54,479,000	279,602,000	151,151,000
OPERATING EXPENSES
Lease operating	5,032,000	2,186,000	11,943,000	7,111,000
Transportation, gathering and compression	30,869,000	26,888,000	92,715,000	78,279,000
Production and ad valorem taxes	2,427,000	1,128,000	6,391,000	5,894,000
Brokered natural gas and marketing expense	8,000	42,000	2,474,000	11,604,000
Depreciation, depletion and amortization	35,588,000	28,225,000	86,929,000	64,287,000
Exploration	8,937,000	12,083,000	29,514,000	45,183,000
General and administrative	11,347,000	8,036,000	32,209,000	29,712,000
Rig termination and standby		(112,000)		3,843,000
Impairment of proved oil and gas properties				17,665,000
Accretion of asset retirement obligations	143,000	100,000	395,000	275,000
(Gain) loss on sale of assets	(13,000)	102,000	(12,000)	(944,000)
Total operating expenses	94,338,000	78,678,000	262,558,000	262,909,000
OPERATING INCOME (LOSS)	(2,789,000)	(24,199,000)	17,044,000	(111,758,000)
OTHER INCOME (EXPENSE)
Gain (loss) on derivative instruments	(1,889,000)	10,639,000	41,385,000	(8,407,000)
Interest expense, net	(12,016,000)	(12,393,000)	(36,763,000)	(38,293,000)
Gain (loss) on early extinguishment of debt				14,489,000
Other income (expense)		4,000	(19,000)	(137,000)
Total other income (expense), net	(13,905,000)	(1,750,000)	4,603,000	(32,348,000)
INCOME (LOSS) BEFORE INCOME TAXES	(16,694,000)	(25,949,000)	21,647,000	(144,106,000)
INCOME TAX BENEFIT (EXPENSE)			0	(540,000)
NET INCOME (LOSS)	$ (16,694,000)	$ (25,949,000)	$ 21,647,000	$ (144,646,000)
NET INCOME (LOSS) PER COMMON SHARE
Basic	$ (0.06)	$ (0.10)	$ 0.08	$ (0.62)
Diluted	$ (0.06)	$ (0.10)	$ 0.08	$ (0.62)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
Basic	262,586	258,812	262,044	234,933
Diluted	262,586	258,812	264,717	234,933