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Condensed Consolidated Statements Of Operations (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Condensed Consolidated Statements Of Operations [Abstract]        
Revenues $ 4,034 $ 5,806 $ 12,219 $ 15,990
Cost and expenses        
Production costs and taxes 1,560 1,746 4,121 5,347
Depreciation, depletion, and amortization 673 942 2,210 2,511
General and administrative 461 887 1,440 2,246
Total cost and expenses 2,694 3,575 7,771 10,104
Net income from operations 1,340 2,231 4,448 5,886
Other income (expense)        
Interest expense (79) (191) (319) (585)
Gain (loss) on derivatives   (35)   (140)
Gain (loss) on sale of assets (13) 16 49 83
Total other income (expenses) (92) (210) (270) (642)
Income from continuing operations before income tax 1,248 2,021 4,178 5,244
Income tax expense (713) (742) (1,860) (1,859)
Income from continuing operations 535 1,279 2,318 3,385
(Loss) from discontinued operations, net of income tax benefit (54) (60) (128) (206)
Net income $ 481 $ 1,219 $ 2,190 $ 3,179
Net income (loss) per share - Basic and Diluted        
Net income from continuing operations $ 0.01 $ 0.02 $ 0.04 $ 0.06
Net (loss) from discontinued operations $ 0.00 $ 0.00 $ 0.00 $ 0.00
Shares used in computing earnings per share        
Basic 60,842,413 60,787,413 60,842,413 60,762,778
Diluted 60,854,655 61,114,850 60,945,588 61,195,751