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Common Shares - Warrants (Details)	1 Months Ended
	Aug. 31, 2019 shares
Common Shares
Class Of Warrant Or Right, Remaining, Expired	6,514,625

X

- References

No definition available.

+ Details

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

X

- Definition

The remaining number of warrants or rights outstanding that have expired during the reporting period.

+ References

No definition available.

+ Details

Name:	vgz_ClassOfWarrantOrRightRemainingExpired
Namespace Prefix:	vgz_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration