Income Taxes (Narrative) (Details) - USD ($) |
3 Months Ended | 6 Months Ended |
|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2019 |
|
| Income Taxes [Line Items] | ||
| Effective income tax rate | 79.00% | 79.00% |
| Uncertain tax positions | $ 0 | |
| Corporate Joint Venture [Member] | ||
| Income Taxes [Line Items] | ||
| Statutory tax rate | 21.00% | |
| Authorities Other Than United States And Gabon [Member] | ||
| Income Taxes [Line Items] | ||
| Effective income tax rate | 0.00% |
| X | ||||||||||
- Definition Income Taxes [Line Items] No definition available.
|
| X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|