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v2.4.1.9

Income Tax (Rate Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Income taxed at statutory rates | $ (7,314)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ (28,916)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ (34,860)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Stock-based compensation | 41 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 13 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 147 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Meals and entertainment | 3 us-gaap_IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment | 9 us-gaap_IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment | 3 us-gaap_IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment
Loss related to Mexico |  | (2,632)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential |
Other adjustments |  | (9)us-gaap_IncomeTaxReconciliationOtherAdjustments | 6 us-gaap_IncomeTaxReconciliationOtherAdjustments
Adjustments due to capital transactions |  | (60)vgz_AdjustmentsDueToCapitalTransactions | (733)vgz_AdjustmentsDueToCapitalTransactions
Imputed Interest | 3 vgz_ImputedInterest | 3 vgz_ImputedInterest | 24 vgz_ImputedInterest
Realized fx gain (loss) on intercompany balances |  | (3)vgz_RealizedFxGainLossOnIntercompanyBalances | (3)vgz_RealizedFxGainLossOnIntercompanyBalances
Prior year provision to actual adjustments | (4,511)vgz_PriorYearProvisionToActualAdjustments | 9,961 vgz_PriorYearProvisionToActualAdjustments | (40)vgz_PriorYearProvisionToActualAdjustments
Differences in tax rates | 541 vgz_DifferencesInTaxRates | 3,451 vgz_DifferencesInTaxRates | 3,905 vgz_DifferencesInTaxRates
Effect of foreign exchange | 276 vgz_EffectOfForeignExchange |  | (340)vgz_EffectOfForeignExchange
Change in effective tax rate | (1)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate | (407)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate | (333)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate
Expiration of NOLs | 189 vgz_ExpirationOfNols | 437 vgz_ExpirationOfNols | 70 vgz_ExpirationOfNols
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance | 10,773 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 2,780 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 12,007 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Deferred Income Tax Expense (Benefit), Total |  | $ (15,373)us-gaap_DeferredIncomeTaxExpenseBenefit | $ (20,147)us-gaap_DeferredIncomeTaxExpenseBenefit

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e32123-109318 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1 -Article 4 + Details
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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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