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Nature of Operations (Details)	12 Months Ended
	Dec. 31, 2020
Mt Todd, Australia
Property, Plant and Equipment [Line Items]
Percentage of ownership in project	100.00%

X

- 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.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the percentage of ownership by the entity in the project.

+ References

No definition available.

+ Details

Name:	vgz_PercentageOfProjectOwned
Namespace Prefix:	vgz_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=vgz_MtToddAustraliaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: