CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Oil and gas production revenues	$ 40,594,000	$ 18,787,000
Other	36,000	15,000
Revenues	40,630,000	18,802,000
Operating costs and expenses:
Lease operating	4,569,000	4,118,000
Production and ad valorem taxes	3,113,000	1,620,000
Depreciation, depletion, and amortization	10,130,000	5,374,000
General and administrative (including stock-based compensation of $586 and $770, respectively)	2,728,000	2,737,000
Operating costs and expenses	20,540,000	13,849,000
Operating income	20,090,000	4,953,000
Other (income) expense:
Interest expense	1,329,000	507,000
Amortization of deferred financing fees	96,000	137,000
Loss (gain) on derivative contracts	7,883,000	(9,381,000)
Loss on sale of non-oil and gas assets	3,000	0
Total other (income) expense	9,311,000	(8,737,000)
Income before income tax	10,779,000	13,690,000
Income tax (expense) benefit	0	0
Net income	$ 10,779,000	$ 13,690,000
Net (loss) income per common share
Net income (loss) per common share - basic (in usd per share	$ 0.07	$ 0.09
Net income (loss) per common share - diluted (in usd per share)	$ 0.06	$ 0.09
Weighted average shares outstanding:
Weighted average shares outstanding, basic (shares)	165,133	154,118
Weighted average shares outstanding, diluted (shares)	167,243	156,813
Oil [Member]
Revenues:
Oil and gas production revenues	$ 35,994,000	$ 15,502,000
Natural Gas [Member]
Revenues:
Oil and gas production revenues	2,377,000	1,982,000
Natural Gas Liquids [Member]
Revenues:
Oil and gas production revenues	$ 2,223,000	$ 1,303,000