XML 76 R58.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Segment Information (Segment Activity) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues-oil and natural gas sales | $ 17,523 | [1] | $ 17,546 | [1] | $ 27,137 | [1] | $ 18,239 | [1] | $ 23,037 | [1] | $ 24,486 | [1] | $ 52,098 | [1] | $ 28,071 | [1] | $ 80,445 | $ 127,691 | $ 169,277
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33,010 | 20,086 | 16,929
Impairment of proved properties | 52,100 |  | 18,000 |  | 5,800 |  | 5,400 |  | 98,300 |  |  |  |  |  |  |  | 81,322 | 98,341 |
Bad debt expense and other |  |  | 2,700 |  |  |  |  |  | 600 |  | 1,800 |  |  |  |  |  | 2,968 | 2,400 | 3,326
Operating income (loss) | (75,124) |  | $ (32,121) |  | $ (1,030) |  | $ (35,278) |  | (94,270) |  | $ 6,687 |  | $ 33,828 |  | $ (650) |  | (143,553) | (54,406) | 77,225
Interest income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,325) | 75 | 73
Income tax expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,587 | 22,486 | 34,115
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 66,419 | 87,111 | 53,691
Long lived assets | 33,373 |  |  |  |  |  |  |  | 108,124 |  |  |  |  |  |  |  | 33,373 | 108,124 |
Total assets | 123,958 |  |  |  |  |  |  |  | 248,849 |  |  |  |  |  |  |  | 123,958 | 248,849 |
United States [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues-oil and natural gas sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 498 | 1,369 | 1,891
Operating Segments [Member] | Gabon [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues-oil and natural gas sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 79,947 | 126,322 | 167,386
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32,125 | 19,079 | 15,310
Impairment of proved properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 78,080 | 98,341 |
Bad debt expense and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,968 | 2,400 |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (87,243) | (42,105) | 98,795
Interest income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,144) | 42 | 40
Income tax expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,238 | 22,486 | 34,115
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 66,269 | 83,170 | 53,015
Long lived assets | 21,329 |  |  |  |  |  |  |  | 76,247 |  |  |  |  |  |  |  | 21,329 | 76,247 |
Total assets | 98,858 |  |  |  |  |  |  |  | 192,957 |  |  |  |  |  |  |  | 98,858 | 192,957 |
Operating Segments [Member] | Angola [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 | 12 | 28
Bad debt expense and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,326
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (40,447) | (3,798) | (3,018)
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,117 | 629
Long lived assets | 16 |  |  |  |  |  |  |  | 14,645 |  |  |  |  |  |  |  | 16 | 14,645 |
Total assets | 10,304 |  |  |  |  |  |  |  | 22,305 |  |  |  |  |  |  |  | 10,304 | 22,305 |
Operating Segments [Member] | Equatorial Guinea [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,342) | (1,525) | (768)
Long lived assets | 10,000 |  |  |  |  |  |  |  | 10,000 |  |  |  |  |  |  |  | 10,000 | 10,000 |
Total assets | 10,200 |  |  |  |  |  |  |  | 10,197 |  |  |  |  |  |  |  | 10,200 | 10,197 |
Operating Segments [Member] | United States [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues-oil and natural gas sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 498 | 1,369 | 1,891
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 633 | 901 | 1,528
Impairment of proved properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,242 |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,366) | (119) | (11,869)
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8 |
Long lived assets | 1,234 |  |  |  |  |  |  |  | 6,359 |  |  |  |  |  |  |  | 1,234 | 6,359 |
Total assets | 1,470 |  |  |  |  |  |  |  | 6,611 |  |  |  |  |  |  |  | 1,470 | 6,611 |
Corporate And Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation, depletion and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 240 | 94 | 63
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (10,155) | (6,859) | (5,915)
Interest income (expense), net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (181) | 33 | 33
Income tax expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,349 |  |
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150 | 816 | $ 47
Long lived assets | 794 |  |  |  |  |  |  |  | 873 |  |  |  |  |  |  |  | 794 | 873 |
Total assets | $ 3,126 |  |  |  |  |  |  |  | $ 16,779 |  |  |  |  |  |  |  | $ 3,126 | $ 16,779 |
[1] | As discussed in Note 3 to the consolidated financial statements an error was identified the prepaid royalty account that caused previous periods to be misstated. Total revenues were corrected through an out of period adjustment in the fourth quarter of 2015 with reduction of $2.3 million, overstating operating loss and net loss by $2.3 million.

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: 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=56944662&loc=d3e3602-108585 + Details
Name: | us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51659069&loc=d3e92212-112881 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Impairment -URI http://asc.fasb.org/extlink&oid=6515133 Reference 3: 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=56944662&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2921-110230 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228 + Details
Name: | us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 2: 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=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The net amount of operating interest income (expense). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.10) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
Name: | us-gaap_InterestIncomeExpenseNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Revenue from the sale of oil and gas during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e62246-109447 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e62136-109447 + Details
Name: | us-gaap_OilAndGasSalesRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. + 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 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_OtherCostAndExpenseOperating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAdditions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_GA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_AO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_GQ
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |