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Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Consolidated Statements Of Operations [Abstract] |  |  |
Revenues | $ 20,557 | $ 17,062 | $ 13,211
Cost and expenses |  |  |
Production costs and taxes | 7,182 | 5,944 | 5,853
Depreciation, depletion, and amortization | 3,403 | 2,527 | 2,206
General and administrative | 2,613 | 2,324 | 2,294
Total cost and expenses | 13,198 | 10,795 | 10,353
Income from operations | 7,359 | 6,267 | 2,858
Other income (expense) |  |  |
Interest expense | (743) | (642) | (659)
Gain (loss) on derivatives | (142) | (407) | 492
Gain (loss) on sale of assets | 83 | 37 | 15
Total other income (expenses) | (802) | (1,012) | (152)
Income from continuing operations before income tax | 6,557 | 5,255 | 2,706
Deferred income tax expense | (2,226) | (245) | (795)
Current income tax expense | (87) | (44) |
Income from continuing operations | 4,244 | 4,966 | 1,911
(Loss) from discontinued operations, net of income tax benefit | (4,311) | (286) | (3,656)
Net income (loss) | $ (67) | $ 4,680 | $ (1,745)
Net income (loss) per share - Basic |  |  |
Net income from continuing operations | $ 0.07 | $ 0.08 | $ 0.03
Net (loss) from discontinued operations | $ (0.07) | $ 0.00 | $ (0.06)
Net income (loss) per share - Diluted |  |  |
Net income from continuing operations | $ 0.07 | $ 0.08 | $ 0.03
Net (loss) from discontinued operations | $ (0.07) | $ 0.00 | $ (0.06)
Shares used in computing earnings per share |  |  |
Basic | 60,778,356 | 60,701,660 | 60,415,859
Diluted | 61,154,631 | 61,088,983 | 60,656,992

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- Definition Cost incurred related to the upstream oil and gas activities, such as the exploration, development, and production of crude petroleum and natural gas and all taxes not related to income of the entity or excise or sales taxes levied on the revenue of the entity that are not reported elsewhere. These taxes could include production, real estate, personal property, and pump tax. + References No definition available. + Details
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- Definition The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 289 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330036-122817 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Deferred Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6510177 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section I -Subsection 7 + Details
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