XML 89 R57.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Income Tax (Operating Loss Carryforward Expirations) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Operating loss carryforwards | $ (63,684) |
Expiring net operating loss carryforwards | (63,684) |
Equity component for share-issuance cost deduction | 32 | $ 41
Canada [Member] |  |
Expiring noncapital loss carryforwards | (40,141) |
Capital loss carryforwards | 61,526 |
Equity component for share-issuance cost deduction | 20,033 |
U.S. [Member] |  |
Expiring net operating loss carryforwards | (16,669) |
Mexico [Member] |  |
Expiring net operating loss carryforwards | (6,725) |
Barbados [Member] |  |
Expiring net operating loss carryforwards | (150) |
Australia [Member] |  |
Operating loss carryforwards | (43,153) |
Tax Year 2015 [Member] |  |
Expiring net operating loss carryforwards | (2) |
Tax Year 2015 [Member] | Barbados [Member] |  |
Expiring net operating loss carryforwards | (2) |
Tax Year 2016 [Member] |  |
Expiring net operating loss carryforwards | (1) |
Tax Year 2016 [Member] | Barbados [Member] |  |
Expiring net operating loss carryforwards | (1) |
Tax Year 2017 [Member] |  |
Expiring net operating loss carryforwards | (6) |
Tax Year 2017 [Member] | Barbados [Member] |  |
Expiring net operating loss carryforwards | (6) |
Tax Year 2018 [Member] |  |
Expiring net operating loss carryforwards | (20) |
Tax Year 2018 [Member] | Barbados [Member] |  |
Expiring net operating loss carryforwards | (20) |
Tax Year 2019 [Member] |  |
Expiring net operating loss carryforwards | (42) |
Tax Year 2019 [Member] | Barbados [Member] |  |
Expiring net operating loss carryforwards | (42) |
Tax Year 2020[Member] |  |
Expiring net operating loss carryforwards | (20) |
Tax Year 2020[Member] | Barbados [Member] |  |
Expiring net operating loss carryforwards | (20) |
Tax Year 2021 [Member] |  |
Expiring net operating loss carryforwards | (31) |
Tax Year 2021 [Member] | Barbados [Member] |  |
Expiring net operating loss carryforwards | (31) |
Tax Year 2022 [Member] |  |
Expiring net operating loss carryforwards | (6,398) |
Tax Year 2022 [Member] | Mexico [Member] |  |
Expiring net operating loss carryforwards | (6,375) |
Tax Year 2022 [Member] | Barbados [Member] |  |
Expiring net operating loss carryforwards | (23) |
Tax Year 2023 [Member] |  |
Expiring net operating loss carryforwards | (354) |
Tax Year 2023 [Member] | Mexico [Member] |  |
Expiring net operating loss carryforwards | (350) |
Tax Year 2023 [Member] | Barbados [Member] |  |
Expiring net operating loss carryforwards | (4) |
Tax Year 2026 [Member] |  |
Expiring net operating loss carryforwards | (1,652) |
Tax Year 2026 [Member] | Canada [Member] |  |
Expiring noncapital loss carryforwards | (1,027) |
Tax Year 2026 [Member] | U.S. [Member] |  |
Expiring net operating loss carryforwards | (625) |
Tax Year 2027 [Member] |  |
Expiring net operating loss carryforwards | (2,547) |
Tax Year 2027 [Member] | Canada [Member] |  |
Expiring noncapital loss carryforwards | (847) |
Tax Year 2027 [Member] | U.S. [Member] |  |
Expiring net operating loss carryforwards | (1,700) |
Tax Year 2028 [Member] |  |
Expiring net operating loss carryforwards | (6,964) |
Tax Year 2028 [Member] | Canada [Member] |  |
Expiring noncapital loss carryforwards | (5,245) |
Tax Year 2028 [Member] | U.S. [Member] |  |
Expiring net operating loss carryforwards | (1,719) |
Tax Year 2029 [Member] |  |
Expiring net operating loss carryforwards | (5,992) |
Tax Year 2029 [Member] | Canada [Member] |  |
Expiring noncapital loss carryforwards | (4,022) |
Tax Year 2029 [Member] | U.S. [Member] |  |
Expiring net operating loss carryforwards | (1,970) |
Tax Year 2030 [Member] |  |
Expiring net operating loss carryforwards | (6,859) |
Tax Year 2030 [Member] | Canada [Member] |  |
Expiring noncapital loss carryforwards | (5,032) |
Tax Year 2030 [Member] | U.S. [Member] |  |
Expiring net operating loss carryforwards | (1,827) |
Tax Year 2031 [Member] |  |
Expiring net operating loss carryforwards | (7,213) |
Tax Year 2031 [Member] | Canada [Member] |  |
Expiring noncapital loss carryforwards | (3,806) |
Tax Year 2031 [Member] | U.S. [Member] |  |
Expiring net operating loss carryforwards | (3,407) |
Tax Year 2032 [Member] |  |
Expiring net operating loss carryforwards | (8,720) |
Tax Year 2032 [Member] | Canada [Member] |  |
Expiring noncapital loss carryforwards | (6,397) |
Tax Year 2032 [Member] | U.S. [Member] |  |
Expiring net operating loss carryforwards | (2,323) |
Tax Year 2033 [Member] |  |
Expiring net operating loss carryforwards | (9,174) |
Tax Year 2033 [Member] | Canada [Member] |  |
Expiring noncapital loss carryforwards | (6,076) |
Tax Year 2033 [Member] | U.S. [Member] |  |
Expiring net operating loss carryforwards | (3,098) |
Tax Year 2034 [Member] |  |
Expiring net operating loss carryforwards | (4,420) |
Tax Year 2034 [Member] | Canada [Member] |  |
Expiring noncapital loss carryforwards | (4,420) |
Tax year 2035 [Member] |  |
Expiring net operating loss carryforwards | (3,269) |
Tax year 2035 [Member] | Canada [Member] |  |
Expiring noncapital loss carryforwards | $ (3,269) |

X
- 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 nondeductible equity-based compensation costs. + 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 + Details
Name: | us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of capital loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References No definition available. + Details
Name: | vgz_CapitalLossCarryforwards
Namespace Prefix: | vgz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expiring noncapital loss carryforwards. + References No definition available. + Details
Name: | vgz_ExpiringNoncapitalLossCarryforwards
Namespace Prefix: | vgz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of operating loss carryforwards that are expiring. + References No definition available. + Details
Name: | vgz_ExpiringOperatingLossCarryforwards
Namespace Prefix: | vgz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_MX
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_BB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_AU
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2028Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2030Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2031Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2032Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2033Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2034Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TaxPeriodAxis=vgz_TaxYear2035Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |