Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Oil and gas sales	$ 24,917	$ 20,772
Expenses:
Lease operating expenses	7,040	7,076
Production taxes	1,227	308
Depreciation, depletion and amortization	6,505	6,117
General and administrative	3,300	3,153
Accretion of asset retirement obligation	198	547
Interest expense	7,481	7,258
Expenses	25,751	24,459
Other income:
Other income	13	54
Loss from operations	(821)	(3,633)
Income tax expense	106	0
Net loss	(927)	(3,633)
Preferred stock dividend	1,285	1,285
Loss available to common stockholders	$ (2,212)	$ (4,918)
Basic
Net loss per share (in usd per share)	$ (0.09)	$ (0.23)
Diluted
Net loss per share (in usd per share)	$ (0.09)	$ (0.23)
Weighted average number of common shares:
Basic (shares)	25,540	21,208
Diluted (shares)	25,540	21,208