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Revenue (Table) | 9 Months Ended
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Sep. 30, 2018
Revenue [Abstract] |
Revenues From Contracts With Customers |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
﻿ |  | 2018 |  | 2017 |  | 2018 |  | 2017
﻿ |  | (in thousands)
﻿Revenue from customer contracts: |  |  |  |  |  |  |  |  |  |  |  |
﻿Glencore oil revenue |  | $ | 18,931 |  | $ | 17,757 |  | $ | 74,587 |  | $ | 57,913
﻿Gabonese government share of Profit Oil |  |  | — |  |  | 2,749 |  |  | 2,193 |  |  | 9,039
﻿U.S. oil and natural gas revenue |  |  | — |  |  | 16 |  |  | — |  |  | 46
﻿Other items reported in revenue not associated with customer contracts: |  |  |  |  |  |  |  |  |  |  |  |
﻿Gabonese government share of Profit Oil taken in-kind |  |  | 9,385 |  |  | — |  |  | 9,385 |  |  | —
﻿Carried interest recoupment |  |  | 573 |  |  | 431 |  |  | 1,929 |  |  | 1,818
﻿Royalties |  |  | (3,623) |  |  | (2,775) |  |  | (10,757) |  |  | (8,947)
﻿Total revenue, net |  | $ | 25,266 |  | $ | 18,178 |  | $ | 77,337 |  | $ | 59,869
﻿

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