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Consolidated Statements Of Operations (USD $)
In Thousands, except Share data
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Consolidated Statements Of Operations        
Revenues $ 4,785 $ 3,291 $ 8,447 $ 6,142
Cost and expenses        
Production costs and taxes 1,678 1,535 3,202 2,850
Depreciation, depletion, and amortization 666 628 1,237 1,151
General and administrative 719 560 1,242 1,152
Total cost and expenses 3,063 2,723 5,681 5,153
Net income from operations 1,722 568 2,766 989
Other income (expense)        
Interest expense (164) (174) (309) (352)
Gain (loss) on derivatives 60 721 (306) 883
Gain on sale of assets 8   11  
Total other income (expenses) (96) 547 (604) 531
Income before income tax 1,626 1,115 2,162 1,520
Income tax expense (649) (379) (831) (516)
Net income $ 977 $ 736 $ 1,331 $ 1,004
Net income per share        
Basic and diluted $ 0.02 $ 0.01 $ 0.02 $ 0.02
Shares used in computing earnings per share        
Basic 60,687,413 60,514,781 60,687,413 60,139,804
Diluted 60,761,140 60,614,781 60,761,881 60,239,804