Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Crude oil and natural gas sales	$ 84,521	$ 104,943	$ 77,025
Operating costs and expenses:
Production expense	37,689	40,415	39,697
Exploration Expense		14	7
Depreciation, depletion and amortization	7,083	5,596	6,457
Gain on revision of asset retirement obligations	(379)	(3,325)
General and administrative expense	14,855	11,398	10,377
Bad debt (recovery) expense and other	(341)	(77)	452
Total operating costs and expenses	58,907	54,021	56,990
Other operating income (expense), net	(4,421)	365	(84)
Operating income	21,193	51,287	19,951
Other income (expense):
Derivative instruments gain (loss), net	(446)	4,264	(1,032)
Interest income (expense), net	733	(145)	(1,414)
Other, net	(438)	68	3,145
Total other income (expense), net	(151)	4,187	699
Income from continuing operations before income taxes	21,042	55,474	20,650
Income tax expense (benefit)	23,890	(43,254)	10,378
Income (loss) from continuing operations	(2,848)	98,728	10,272
Income (loss) from discontinued operations, net of tax	5,411	(496)	(621)
Net income	$ 2,563	$ 98,232	$ 9,651
Basic net income (loss) per share:
Income (loss) from continuing operations	$ (0.05)	$ 1.65	$ 0.17
Income (loss) from discontinued operations, net of tax	0.09	(0.01)	(0.01)
Net income per share	$ 0.04	$ 1.64	$ 0.16
Basic weighted average shares outstanding	59,143	59,248	58,717
Diluted net income (loss) per share:
Income (loss) from continuing operations	$ (0.05)	$ 1.63	$ 0.17
Income (loss) from discontinued operations, net of tax	0.09	(0.01)	(0.01)
Net income per share	$ 0.04	$ 1.62	$ 0.16
Diluted weighted average shares outstanding	59,143	59,997	58,720