Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Oil and gas sales	$ 20,886	$ 28,184	$ 67,310	$ 73,207
Expenses:
Lease operating expenses	4,368	8,863	16,380	23,052
Production taxes	890	1,112	2,451	1,990
Depreciation, depletion and amortization	5,486	8,795	18,014	21,753
General and administrative	4,780	3,341	12,084	10,808
Accretion of asset retirement obligation	42	571	282	1,671
Interest expense	9,371	7,371	24,488	21,776
Expenses	24,937	30,053	73,699	81,050
Other income:
Other income (expense)	394	(16)	585	36
Loss from operations	(3,657)	(1,885)	(5,804)	(7,807)
Income tax expense (benefit)	38	(84)	144	(274)
Net loss	(3,695)	(1,801)	(5,948)	(7,533)
Preferred stock dividend	1,284	1,284	3,854	3,854
Loss available to common stockholders	$ (4,979)	$ (3,085)	$ (9,802)	$ (11,387)
Basic
Net loss per share (in usd per share)	$ (0.19)	$ (0.15)	$ (0.38)	$ (0.54)
Diluted
Net loss per share (in usd per share)	$ (0.19)	$ (0.15)	$ (0.38)	$ (0.54)
Weighted average number of common shares:
Basic (shares)	25,587	21,230	25,565	21,222
Diluted (shares)	25,587	21,230	25,565	21,222