Organization and Accounting Policies (Narrative1) (Detail) - USD ($) |
3 Months Ended | ||
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Mar. 31, 2016 |
Dec. 31, 2015 |
Mar. 31, 2015 |
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| Error Corrections and Prior Period Adjustments Restatement [Line Items] | |||
| Current Income Tax Expense (Benefit) | $ 3,000,000 | ||
| Net Income Loss | (8,063,000) | $ (39,005,000) | |
| Angola [Member] | |||
| Error Corrections and Prior Period Adjustments Restatement [Line Items] | |||
| Current Income Tax Expense (Benefit) | $ 3,000,000 | ||
| Group 42-BLR Group [Member] | |||
| Error Corrections and Prior Period Adjustments Restatement [Line Items] | |||
| Legal expense | $ 350,000 | ||
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- Definition Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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