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Commitments And Contingencies (Details) CAD in Thousands, AUD in Thousands, $ in Thousands	1 Months Ended			12 Months Ended
	Nov. 30, 2015 CAD	Nov. 30, 2015 USD ($)	May 31, 2015 USD ($)	Dec. 31, 2016 AUD
Contract dispute settlement | $			$ 295
Used mill equipment, Canada [Member]
Term of lease	2 years	2 years
Monthly rental payment	CAD 18	$ 13
Jawoyn Association Aboriginal Corporation [Member]
Noncontrolling Interest, Ownership Percentage by Parent				90.00%
Percentage of royalty on gold				1.00%
Percentage of royalty on other metals				1.00%
Minimum payment per year | AUD				AUD 50
Mt Todd, Australia [Member] | Jawoyn Association Aboriginal Corporation [Member]
Percentage of participating interest in gold project by affiliate				10.00%

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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Data Type:	xbrli:durationItemType
Balance Type:	na
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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

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Namespace Prefix:	vgz_
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X

- Definition

Settlement for contract that was under dispute.

+ References

No definition available.

+ Details

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Namespace Prefix:	vgz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Minimum payment per year

+ References

No definition available.

+ Details

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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

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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

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X

- Definition

Percentage of royalty on other metals.

+ References

No definition available.

+ Details

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X

- Details

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Namespace Prefix:
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Balance Type:
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X

- Details

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Data Type:	na
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X

- Details

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