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

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

No definition available.

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