Consolidated Statements Of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements Of Operations [Abstract]
Revenues	$ 6,164	$ 13,788	$ 15,700
Cost and expenses
Production costs and taxes	4,224	5,994	5,524
Depreciation, depletion, and amortization	2,676	3,030	2,912
General and administrative	2,069	2,707	2,059
Impairment	14,526	2,796
Total cost and expenses	23,495	14,527	10,495
Income (loss) from operations	(17,331)	(739)	5,205
Other income (expense)
Net interest expense	(80)	(88)	(357)
Gain on sale of assets	41	33	118
Total other (expense)	(39)	(55)	(239)
Income (loss) from continuing operations before income tax	(17,370)	(794)	4,966
Deferred income tax expense	(7,351)	12	(1,915)
Current income tax expense		(6)	(95)
Net income (loss) from continuing operations	(24,721)	(788)	2,956
(Loss) from discontinued operations, net of income tax benefit			(137)
Net income (loss)	$ (24,721)	$ (788)	$ 2,819
Net income (loss) per share - Basic
Net income (loss) from continuing operations	$ (4.06)	$ (0.13)	$ 0.49
Net loss from discontinued operations			(0.02)
Net income (loss) per share - Diluted
Net income (loss) from continuing operations	$ (4.06)	$ (0.13)	0.49
Net loss from discontinued operations			$ (0.02)
Shares used in computing earnings per share
Basic	6,084,241	6,084,241	6,084,241
Diluted	6,084,241	6,084,993	6,091,987