XML 89 R53.htm IDEA: XBRL DOCUMENT v3.8.0.1

Commitments And Contingencies (Details) - Mt Todd, Australia [Member] - Jawoyn Association Aboriginal Corporation [Member] AUD in Thousands	12 Months Ended
	Dec. 31, 2017 AUD
Loss Contingencies [Line Items]
Percentage of outstanding common shares	90.00%
Percentage of participating interest in gold project by affiliate	10.00%
Percentage of royalty on gold	1.00%
Percentage of royalty on other metals	1.00%
Minimum payment per year	AUD 50

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_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
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

Name:	vgz_CashPaymentToAffiliateAsPercentageOfValueOfAnnualGoldProductionFromCurrentMiningLeases
Namespace Prefix:	vgz_
Data Type:	num:percentItemType
Balance Type:	na
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

Percentage of participating interest in gold project by affiliate.

+ References

No definition available.

+ Details

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

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

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

X

- Details

Name:	us-gaap_CounterpartyNameAxis=vgz_JawoynAssociationAboriginalCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: