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v3.20.2

Segment Information (Segment Activity) (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Segment Reporting Information [Line Items] |  |  |  |
Revenues-crude oil and natural gas sales | $ 18,256,000 | $ 17,603,000 | $ 54,619,000 | $ 62,598,000
Depreciation, depletion and amortization | 2,212,000 | 1,509,000 | 8,116,000 | 4,971,000
Impairment of proved crude oil and natural gas properties | 0 |  | 30,625,000 |
Bad debt expense and other | 151,000 | 54,000 | 1,140,000 | 30,000
Other operating income (expense), net | (37,000) | 35,000 | (883,000) | (4,401,000)
Operating income (loss) | 4,678,000 | 1,501,000 | (22,971,000) | 13,417,000
Derivative instruments gain, net |  | 2,267,000 | 6,583,000 | 2,266,000
Interest income, net |  |  |  | 581,000
Other, net | 147,000 | (138,000) | 163,000 | (521,000)
Income tax expense | (2,759,000) | 7,681,000 | 28,470,000 | 19,642,000
Additions to crude oil and natural gas properties and equipment - accrual | (315,000) | 6,112,000 | 10,296,000 | 8,419,000
Operating Segments [Member] | Gabon Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues-crude oil and natural gas sales | 18,256,000 | 17,603,000 | 54,619,000 | 62,598,000
Depreciation, depletion and amortization | 1,946,000 | 1,437,000 | 7,790,000 | 4,751,000
Impairment of proved crude oil and natural gas properties |  |  | 30,625,000 |
Bad debt expense and other |  |  | 1,140,000 |
Other operating income (expense), net |  |  | (883,000) | (4,436,000)
Operating income (loss) | 6,957,000 | 6,048,000 | (17,622,000) | 24,541,000
Interest income, net |  |  |  | 4,000
Other, net |  |  |  | (333,000)
Income tax expense | (2,464,000) | 4,774,000 | 19,302,000 | 15,134,000
Additions to crude oil and natural gas properties and equipment - accrual | (306,000) | 6,112,000 | 10,305,000 | 8,386,000
Operating Segments [Member] | Equatorial Guinea Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income (loss) | (95,000) | (54,000) | (289,000) | (370,000)
Other, net |  |  |  | (4,000)
Income tax expense | 1,000 |  | 1,000 | 12,000
Additions to crude oil and natural gas properties and equipment - accrual |  |  |  | (187,000)
Corporate and Other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Depreciation, depletion and amortization | 266,000 | 72,000 | 326,000 | 220,000
Other operating income (expense), net |  |  |  | 35,000
Operating income (loss) | (2,184,000) | (4,493,000) | (5,060,000) | (10,754,000)
Derivative instruments gain, net |  | 2,267,000 | 6,583,000 | 2,266,000
Interest income, net |  |  |  | 577,000
Other, net |  |  |  | (184,000)
Income tax expense | (296,000) | $ 2,907,000 | 9,167,000 | 4,496,000
Additions to crude oil and natural gas properties and equipment - accrual | $ (9,000) |  | $ (9,000) | $ 220,000

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