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Commitments And Contingencies (Details) CAD in Thousands, AUD in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2015 CAD | Nov. 30, 2015 USD ($) | May 31, 2015 USD ($) | Dec. 31, 2016 AUD
Contract dispute settlement | $ |  |  | $ 295 |
Used mill equipment, Canada [Member] |  |  |  |
Term of lease | 2 years | 2 years |  |
Monthly rental payment | CAD 18 | $ 13 |  |
Jawoyn Association Aboriginal Corporation [Member] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  | 90.00%
Percentage of royalty on gold |  |  |  | 1.00%
Percentage of royalty on other metals |  |  |  | 1.00%
Minimum payment per year | AUD |  |  |  | AUD 50
Mt Todd, Australia [Member] | Jawoyn Association Aboriginal Corporation [Member] |  |  |  |
Percentage of participating interest in gold project by affiliate |  |  |  | 10.00%

X
- Definition Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Cash payment to affiliate as percentage of value of annual gold production from current mining leases. + References No definition available. + Details
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Namespace Prefix: | vgz_
Data Type: | num:percentItemType
Balance Type: | na
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X
- Definition Settlement for contract that was under dispute. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Minimum payment per year + References No definition available. + Details
Name: | vgz_MinimumPaymentPerYear
Namespace Prefix: | vgz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the monthly rental payment per the lease agreement. + References No definition available. + Details
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Namespace Prefix: | vgz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of participating interest in gold project by affiliate. + References No definition available. + Details
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Balance Type: | na
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X
- Definition Percentage of royalty on other metals. + References No definition available. + Details
Name: | vgz_PercentageOfRoyaltyOnOtherMetals
Namespace Prefix: | vgz_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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