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

Represents the back in right percentage granting entity the right to assume a specified non-carried interest in an underground project if counterparty in option agreement decides to develop an underground mine.

No definition available.

Name:	vgz_BackInRightPercentage
Namespace Prefix:	vgz_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the gold price per ounce.

No definition available.

Name:	vgz_GoldPrice
Namespace Prefix:	vgz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The number of successive payments per option agreement.

No definition available.

Name:	vgz_NumberOfSuccessivePayments
Namespace Prefix:	vgz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The percentage of interest in project that the counterparty has the exclusive right and option right to earn per the option agreement.

No definition available.

Name:	vgz_PercentageOfInterestPerOptionAgreement
Namespace Prefix:	vgz_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percentage of net smelter return royalty on any future productions from specified claims.

No definition available.

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

The percentage of ownership interest if terms of option agreement are not fulfilled.

No definition available.

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

The percentage of ownership to be transferred to counterparty upon timely making all option payments and fulfilling other obligations with respect to Option Agreement.

No definition available.

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

Represents the aggregate amount of royalty payments to be received.

No definition available.

Name:	vgz_RoyaltyPaymentsToBeReceived
Namespace Prefix:	vgz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Sale price of gold/silver project.

No definition available.

Name:	vgz_SalePriceOfGoldProject
Namespace Prefix:	vgz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_CounterpartyNameAxis=vgz_MineraAlamosInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TransactionTypeAxis=vgz_OptionAgreementTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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

Name:	us-gaap_ProductOrServiceAxis=vgz_OpenPitMiningMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ProductOrServiceAxis=vgz_UndergroundMiningMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=vgz_ExecutionOfOptionAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=vgz_OneYearAnniversaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementScenarioAxis=vgz_TwoYearAnniversaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: