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v3.20.2

Common Shares - Warrants (Details) | 1 Months Ended
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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