Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Oil and gas sales	$ 15,824	$ 32,550	$ 33,144	$ 66,001
Expenses:
Lease operating expenses	6,864	11,191	15,041	22,093
Production taxes	(48)	948	290	1,904
Depreciation, depletion and amortization	7,193	18,345	17,331	38,999
Ceiling test write-down	12,782	65,495	31,639	174,406
General and administrative	3,871	6,519	12,470	11,858
Accretion of asset retirement obligation	618	823	1,226	1,682
Interest expense	6,503	8,596	14,760	16,470
Expenses	37,783	111,917	92,757	267,412
Other income (expense):
Gain on sale of oil and gas properties	0	21,531	0	21,531
Other income (expense)	(424)	40	(327)	197
Other Income	(424)	21,571	(327)	21,728
Loss from operations	(22,383)	(57,796)	(59,940)	(179,683)
Income tax expense	475	2,000	561	1,073
Net loss	(22,858)	(59,796)	(60,501)	(180,756)
Preferred stock dividend	1,285	1,287	2,779	2,567
Loss available to common stockholders	$ (24,143)	$ (61,083)	$ (63,280)	$ (183,323)
Basic
Net income (loss) per share (in usd per share)	$ (1.38)	$ (3.77)	$ (3.67)	$ (11.31)
Diluted
Net income (loss) per share (in usd per share)	$ (1.38)	$ (3.77)	$ (3.67)	$ (11.31)
Weighted average number of common shares:
Basic (shares)	17,539	16,223	17,248	16,208
Diluted (shares)	17,539	16,223	17,248	16,208