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Segment Information | 12 Months Ended
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Dec. 31, 2017
Segment Information [Abstract] |
Segment Information | 15. SEGMENT INFORMATION Our operations are based in Gabon, Equatorial Guinea and the U.S. Each of our three reportable operating segments is organized and managed based upon geographic location. Our Chief Executive Officer, who is the chief operating decision maker, and m anagement review and evaluate the operation of each geographic segment separately primarily based on Operating income (loss). The operations of all segments include exploration for and production of hydrocarbons where commercial reserves have been found and developed. Revenues are based on the loca tion of hydrocarbon production. Corporate and other is primarily corporate and operations support costs which are not allocated to the reportable operating segments. Segment activity of continuing operations for the years ended Dec ember 31, 2017, 2016 and 2015 and long-lived assets and segment assets at December 31, 2017 and 2016 are as follow s: ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended December 31, 2017
﻿(in thousands) |  | Gabon |  | Equatorial Guinea |  | U.S. |  | Corporate and Other |  | Total
﻿Revenues-oil and natural gas sales |  | $ | 76,978 |  | $ | — |  | $ | 47 |  | $ | — |  | $ | 77,025
﻿Depreciation, depletion and amortization |  |  | 6,196 |  |  | — |  |  | 1 |  |  | 260 |  |  | 6,457
﻿Bad debt expense and other |  |  | 452 |  |  | — |  |  | — |  |  | — |  |  | 452
﻿Operating income (loss) |  |  | 28,488 |  |  | (122) |  |  | 352 |  |  | (8,767) |  |  | 19,951
﻿Other, net |  |  | 3,142 |  |  | 15 |  |  | — |  |  | (1,044) |  |  | 2,113
﻿Interest expense, net |  |  | (1,414) |  |  | — |  |  | — |  |  | — |  |  | (1,414)
﻿Income tax expense (benefit) |  |  | 11,638 |  |  | — |  |  | — |  |  | (1,260) |  |  | 10,378
﻿Additions to property and equipment - accrual |  |  | 1,576 |  |  | — |  |  | — |  |  | 126 |  |  | 1,702
﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended December 31, 2016
﻿(in thousands) |  | Gabon |  | Equatorial Guinea |  | U.S. |  | Corporate and Other |  | Total
﻿Revenues-oil and natural gas sales |  | $ | 59,460 |  | $ | — |  | $ | 324 |  | $ | — |  | $ | 59,784
﻿Depreciation, depletion and amortization |  |  | 6,531 |  |  | — |  |  | 151 |  |  | 244 |  |  | 6,926
﻿Impairment of proved properties |  |  | — |  |  | — |  |  | 88 |  |  | — |  |  | 88
﻿Bad debt expense and other |  |  | 1,222 |  |  | — |  |  | — |  |  | — |  |  | 1,222
﻿Other operating expense |  |  | 8,853 |  |  | — |  |  | — |  |  | — |  |  | 8,853
﻿Operating income (loss) |  |  | 3,901 |  |  | (384) |  |  | (72) |  |  | (7,836) |  |  | (4,391)
﻿Other, net |  |  | (22) |  |  | (8) |  |  | — |  |  | (1,985) |  |  | (2,015)
﻿Interest expense, net |  |  | (2,614) |  |  | — |  |  | — |  |  | 1 |  |  | (2,613)
﻿Income tax expense |  |  | 9,248 |  |  | — |  |  | — |  |  | — |  |  | 9,248
﻿Additions to property and equipment - accrual |  |  | (4,242) |  |  | — |  |  | — |  |  | 181 |  |  | (4,061)
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended December 31, 2015
﻿(in thousands) |  | Gabon |  | Equatorial Guinea |  | U.S. |  | Corporate and Other |  | Total
﻿Revenues-oil and natural gas sales |  | $ | 79,947 |  | $ | — |  | $ | 498 |  | $ | — |  | $ | 80,445
﻿Depreciation, depletion and amortization |  |  | 32,125 |  |  | — |  |  | 633 |  |  | 240 |  |  | 32,998
﻿Impairment of proved properties |  |  | 78,080 |  |  | — |  |  | 3,242 |  |  | — |  |  | 81,322
﻿Bad debt expense and other |  |  | 2,968 |  |  | — |  |  | — |  |  | — |  |  | 2,968
﻿Operating income (loss) |  |  | (87,243) |  |  | (1,342) |  |  | (4,366) |  |  | (10,155) |  |  | (103,106)
﻿Other, net |  |  | (1,034) |  |  | (33) |  |  | — |  |  | (469) |  |  | (1,536)
﻿Interest expense, net |  |  | (1,144) |  |  | — |  |  | — |  |  | (181) |  |  | (1,325)
﻿Income tax expense |  |  | 13,238 |  |  | — |  |  | — |  |  | 1,349 |  |  | 14,587
﻿Additions to property and equipment - accrual |  |  | 66,269 |  |  | — |  |  | — |  |  | 150 |  |  | 66,419
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿(in thousands) |  | Gabon |  | Equatorial Guinea |  | U.S. |  | Corporate and Other |  | Total
﻿Long-lived assets from continuing operations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿As of December 31, 2017 |  | $ | 12,638 |  | $ | 10,000 |  | $ | — |  | $ | 583 |  | $ | 23,221
﻿As of December 31, 2016 |  |  | 17,291 |  |  | 10,000 |  |  | — |  |  | 728 |  |  | 28,019
﻿ Information about our most significant customers For the period from the second quarter of 2014 and through April 2015, our crude oil from Gabon was sold under a contract with The Vitol Group at the spot market for a fixed per barrel fee. Beginning in May 2015, we sold our crude oil production from Gabon under a term contract with pricing based upon an average of Dated Brent in the month of lifting, adjusted for location and market factors. The contracted purchasers were TOTSA Total Oil Trading SA (“Total”) for May through July of 2015 and Glencore Energy UK Ltd. (“Glencore”) for August of 2015 through December of 201 7. The contract with Glencore U.K. ends in January 2019. Sales of oil to Glencore were approximately 100% of total revenues for 201 7.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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