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Commitments And Contingencies (Details) CAD in Thousands, AUD in Thousands, $ in Thousands	1 Months Ended		3 Months Ended
	Nov. 30, 2015 CAD	Nov. 30, 2015 USD ($)	Mar. 31, 2016 AUD
Used mill equipment, Canada [Member]
Term of lease	2 years	2 years
Monthly rental payment	CAD 18	$ 13
Mt Todd, Australia [Member]
Noncontrolling Interest, Ownership Percentage by Parent			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

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

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

Represents the monthly rental payment per the lease agreement.

+ References

No definition available.

+ Details

Name:	vgz_MonthlyRentalPayment
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

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

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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: