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Income Taxes (Details 4)
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12 Months Ended |
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Dec. 31, 2012
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United States [Member]
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| Income Tax years subject to examination by major tax jurisdictions | |
| Income tax examination year under examination range start | 2006 |
| Income tax examination year under examination range end | 2012 |
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Gabon [Member]
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| Income Tax years subject to examination by major tax jurisdictions | |
| Income tax examination year under examination range start | 2007 |
| Income tax examination year under examination range end | 2012 |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Income tax examination year under examination range end. No definition available.
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| X | ||||||||||
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- Definition
Income tax examination year under examination range start. No definition available.
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