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Plant And Equipment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Cost	$ 5,895us-gaap_PropertyPlantAndEquipmentGross	$ 5,903us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation and write downs	3,240us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	3,061us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Net	2,655us-gaap_PropertyPlantAndEquipmentNet	2,842us-gaap_PropertyPlantAndEquipmentNet
Mineral properties (Note 4)	3,870us-gaap_MineralPropertiesNet	5,406us-gaap_MineralPropertiesNet
Period of payment	3 years
Mt. Todd, Australia [Member]
Property, Plant and Equipment [Line Items]
Cost	5,475us-gaap_PropertyPlantAndEquipmentGross / us-gaap_StatementGeographicalAxis = vgz_MtToddAustraliaMember	5,483us-gaap_PropertyPlantAndEquipmentGross / us-gaap_StatementGeographicalAxis = vgz_MtToddAustraliaMember
Accumulated depreciation and write downs	2,912us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_StatementGeographicalAxis = vgz_MtToddAustraliaMember	2,756us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_StatementGeographicalAxis = vgz_MtToddAustraliaMember
Net	2,563us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = vgz_MtToddAustraliaMember	2,727us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = vgz_MtToddAustraliaMember
Guadalupe de los Reyes, Mexico [Member]
Property, Plant and Equipment [Line Items]
Cost	17us-gaap_PropertyPlantAndEquipmentGross / us-gaap_StatementGeographicalAxis = vgz_GuadalupeDeLosReyesMexicoMember	17us-gaap_PropertyPlantAndEquipmentGross / us-gaap_StatementGeographicalAxis = vgz_GuadalupeDeLosReyesMexicoMember
Accumulated depreciation and write downs	8us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_StatementGeographicalAxis = vgz_GuadalupeDeLosReyesMexicoMember	8us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_StatementGeographicalAxis = vgz_GuadalupeDeLosReyesMexicoMember
Net	9us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = vgz_GuadalupeDeLosReyesMexicoMember	9us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = vgz_GuadalupeDeLosReyesMexicoMember
Corporate, United States [Member]
Property, Plant and Equipment [Line Items]
Cost	403us-gaap_PropertyPlantAndEquipmentGross / us-gaap_StatementGeographicalAxis = vgz_CorporateUnitedStatesMember	403us-gaap_PropertyPlantAndEquipmentGross / us-gaap_StatementGeographicalAxis = vgz_CorporateUnitedStatesMember
Accumulated depreciation and write downs	320us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_StatementGeographicalAxis = vgz_CorporateUnitedStatesMember	297us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_StatementGeographicalAxis = vgz_CorporateUnitedStatesMember
Net	83us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = vgz_CorporateUnitedStatesMember	106us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = vgz_CorporateUnitedStatesMember
Assets Held-for-sale [Member]
Property, Plant and Equipment [Line Items]
Asset held for sale, cost	6,500vgz_AssetHeldForSaleCost / us-gaap_StatementGeographicalAxis = us-gaap_AssetsHeldForSaleMember	6,500vgz_AssetHeldForSaleCost / us-gaap_StatementGeographicalAxis = us-gaap_AssetsHeldForSaleMember
Assets held for sale (mill equipment)	$ 6,500us-gaap_AssetsHeldForSaleLongLived / us-gaap_StatementGeographicalAxis = us-gaap_AssetsHeldForSaleMember	$ 6,500us-gaap_AssetsHeldForSaleLongLived / us-gaap_StatementGeographicalAxis = us-gaap_AssetsHeldForSaleMember

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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-Section S99

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- Definition

Long-lived assets that are held for sale apart from normal operations and anticipated to be sold in less than one year.

+ References

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-Publisher FASB

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Mineral properties, net of adjustments.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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