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v3.19.3

Segment Information (Segment Activity) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues-oil and natural gas sales | $ 17,603 | $ 25,266 | $ 62,598 | $ 77,337 |
Depreciation, depletion and amortization | 1,509 | 1,130 | 4,971 | 3,289 |
Gain on revision of asset retirement obligations |  | (3,325) |  | (3,325) | $ 6,527
Other operating income (expense), net | 35 | (6) | (4,401) | 332 |
Operating income (loss) | 1,501 | 17,320 | 13,417 | 36,081 |
Derivative instruments loss, net | 2,267 | (1,026) | 2,266 | (2,036) |
Other, net | (138) | (3) | (521) | (148) |
Interest income (expense), net | 193 | 111 | 581 | (273) |
Income tax expense (benefit) | 7,681 | (62,224) | 19,642 | (54,600) |
Additions to oil and natural gas properties and equipment - accrual | 6,112 | 36,598 | 8,419 | 37,567 |
Operating Segments | Gabon Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues-oil and natural gas sales | 17,603 | 25,265 | 62,598 | 77,333 |
Depreciation, depletion and amortization | 1,437 | 1,065 | 4,751 | 3,095 |
Gain on revision of asset retirement obligations |  | (3,325) |  | (3,325) |
Other operating income (expense), net |  |  | (4,436) | 332 |
Operating income (loss) | 6,048 | 19,826 | 24,541 | 45,670 |
Other, net |  |  | (333) | (127) |
Interest income (expense), net |  |  | 4 | (397) |
Income tax expense (benefit) | 4,774 | (42,141) | 15,134 | (34,517) |
Additions to oil and natural gas properties and equipment - accrual | 6,112 | 36,595 | 8,386 | 37,550 |
Operating Segments | Equatorial Guinea Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income (loss) | (54) | (159) | (370) | (274) |
Other, net |  |  | (4) | (3) |
Income tax expense (benefit) |  |  | 12 |  |
Additions to oil and natural gas properties and equipment - accrual |  |  | (187) |  |
Corporate and Other |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues-oil and natural gas sales |  | 1 |  | 4 |
Depreciation, depletion and amortization | 72 | 65 | 220 | 194 |
Other operating income (expense), net |  |  | 35 |  |
Operating income (loss) | (4,493) | (2,347) | (10,754) | (9,315) |
Derivative instruments loss, net | 2,267 | (1,026) | 2,266 | (2,036) |
Other, net |  |  | (184) | (18) |
Interest income (expense), net |  |  | 577 | 124 |
Income tax expense (benefit) | $ 2,907 | (20,083) | 4,496 | (20,083) |
Additions to oil and natural gas properties and equipment - accrual |  | $ 3 | $ 220 | $ 17 |

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