Condensed Consolidated Statements of Operations (Unaudited) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues
Oil and natural gas revenues	$ 36,078,000	$ 20,864,000	$ 65,242,000	$ 34,562,000
Realized gain on derivatives	4,713,000	952,000	7,776,000	2,802,000
Unrealized (loss) gain on derivatives	15,114,000	332,000	11,844,000	(1,336,000)
Total revenues	55,905,000	22,148,000	84,862,000	36,028,000
Expenses
Production taxes and marketing	2,619,000	1,654,000	4,783,000	2,954,000
Lease operating	6,375,000	1,969,000	11,020,000	3,574,000
Depletion, depreciation and amortization	19,913,000	8,179,000	31,119,000	15,290,000
Accretion of asset retirement obligations	58,000	57,000	111,000	96,000
Full-cost ceiling impairment	33,205,000		33,205,000	35,673,000
General and administrative	4,093,000	3,094,000	7,882,000	5,712,000
Total expenses	66,263,000	14,953,000	88,120,000	63,299,000
Operating (loss) income	(10,358,000)	7,195,000	(3,258,000)	(27,271,000)
Other income (expense)
Net loss on asset sales and inventory impairment	(60,000)		(60,000)
Interest expense	(1,000)	(183,000)	(309,000)	(290,000)
Interest and other income	30,000	94,000	103,000	166,000
Total other expense	(31,000)	(89,000)	(266,000)	(124,000)
(Loss) income before income taxes	(10,389,000)	7,106,000	(3,524,000)	(27,395,000)
Income tax provision (benefit)
Current		(46,000)		(46,000)
Deferred	(3,713,000)		(649,000)	(6,906,000)
Total income tax benefit	(3,713,000)	(46,000)	(649,000)	(6,952,000)
Net (loss) income	$ (6,676,000)	$ 7,152,000	$ (2,875,000)	$ (20,443,000)
Basic
Basic	55,271	42,698	52,644	42,677
Diluted
Diluted	55,271	42,813	52,644	42,677
Class A
Basic
Basic	$ (0.12)	$ 0.17	$ (0.06)	$ (0.48)
Diluted
Diluted	$ (0.12)	$ 0.17	$ (0.06)	$ (0.48)
Basic
Basic	55,271	41,667	52,434	41,646
Diluted
Diluted	55,271	41,782	52,434	41,646
Class B
Basic
Basic		$ 0.23	$ 0.07	$ (0.35)
Diluted
Diluted		$ 0.23	$ 0.07	$ (0.35)
Basic
Basic		1,031	210	1,031
Diluted
Diluted		1,031	210	1,031