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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2014
Segment Reporting [Abstract] |
Segment Activity |
2014 |  | Gabon |  |  | Angola |  |  | Equatorial Guinea |  |  | USA |  |  | Corporate and Other |  |  | Total |
Revenues |  | $ | 126,322 |  |  | $ | - |  |  | $ | - |  |  | $ | 1,369 |  |  | $ | - |  |  | $ | 127,691 |
Depreciation, depletion and amortization |  |  | 19,079 |  |  |  | 12 |  |  |  | - |  |  |  | 901 |  |  |  | 94 |  |  |  | 20,086 |
Operating income (loss) |  |  | (42,105 | ) |  |  | (3,798 | ) |  |  | (1,525 | ) |  |  | (119 | ) |  |  | (6,859 | ) |  |  | (54,406 | )
Interest income |  |  | 42 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 33 |  |  |  | 75 |
Income taxes |  |  | 22,486 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 22,486 |
Bad debt and other expenses |  |  | 2,400 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 2,400 |
Impairment of proved properties |  |  | 98,341 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 98,341 |
Additions to properties and equipment |  |  | 83,170 |  |  |  | 3,117 |  |  |  | - |  |  |  | 8 |  |  |  | 816 |  |  |  | 87,111 |
Long lived assets |  |  | 76,247 |  |  |  | 14,645 |  |  |  | 10,000 |  |  |  | 6,359 |  |  |  | 873 |  |  |  | 108,124 |
Total assets |  |  | 192,957 |  |  |  | 22,305 |  |  |  | 10,197 |  |  |  | 6,611 |  |  |  | 16,779 |  |  |  | 248,849 |
2013 |  | Gabon |  |  | Angola |  |  | Equatorial Guinea |  |  | USA |  |  | Corporate and Other |  |  | Total |
Revenues |  | $ | 167,386 |  |  | $ | - |  |  | $ | - |  |  | $ | 1,891 |  |  | $ | - |  |  | $ | 169,277 |
Depreciation, depletion and amortization |  |  | 15,310 |  |  |  | 28 |  |  |  | - |  |  |  | 1,528 |  |  |  | 63 |  |  |  | 16,929 |
Operating income (loss) |  |  | 98,795 |  |  |  | (3,018 | ) |  |  | (768 | ) |  |  | (11,869 | ) |  |  | (5,915 | ) |  |  | 77,225 |
Interest income |  |  | 40 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 33 |  |  |  | 73 |
Income taxes |  |  | 34,115 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 34,115 |
Bad debt and other expenses |  |  | 1,764 |  |  |  | 1,562 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 3,326 |
Additions to properties and equipment |  |  | 53,015 |  |  |  | 629 |  |  |  | - |  |  |  | - |  |  |  | 47 |  |  |  | 53,691 |
Long lived assets |  |  | 109,597 |  |  |  | 11,540 |  |  |  | 10,000 |  |  |  | 7,235 |  |  |  | 152 |  |  |  | 138,524 |
Total assets |  |  | 256,033 |  |  |  | 12,204 |  |  |  | 10,059 |  |  |  | 9,660 |  |  |  | 20,211 |  |  |  | 308,167 |
2012 |  | Gabon |  |  | Angola |  |  | Equatorial Guinea |  |  | USA |  |  | Corporate and Other |  |  | Total |
Revenues |  | $ | 192,489 |  |  | $ | - |  |  | $ | - |  |  | $ | 2,798 |  |  | $ | - |  |  | $ | 195,287 |
Depreciation, depletion and amortization |  |  | 15,954 |  |  |  | 28 |  |  |  | - |  |  |  | 3,872 |  |  |  | 59 |  |  |  | 19,913 |
Operating income (loss) |  |  | 147,985 |  |  |  | (3,293 | ) |  |  | (754 | ) |  |  | (48,940 | ) |  |  | (8,405 | ) |  |  | 86,593 |
Interest income |  |  | 60 |  |  |  | (1 | ) |  |  | - |  |  |  | - |  |  |  | 86 |  |  |  | 145 |
Income taxes |  |  | 81,813 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 81,813 |
Bad debt and expenses |  |  | - |  |  |  | 1,621 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1,621 |
Impairment of proved properties |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 7,620 |  |  |  | - |  |  |  | 7,620 |
Additions to properties and equipment |  |  | 22,731 |  |  |  | - |  |  |  | 10,000 |  |  |  | 13,558 |  |  |  | 77 |  |  |  | 46,366 |
Long lived assets |  |  | 71,225 |  |  |  | 10,938 |  |  |  | 10,000 |  |  |  | 14,279 |  |  |  | 166 |  |  |  | 106,608 |
Total assets |  |  | 190,652 |  |  |  | 11,405 |  |  |  | 10,000 |  |  |  | 17,314 |  |  |  | 38,585 |  |  |  | 267,956 |

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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 + Details
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