XML 27 R40.htm IDEA: XBRL DOCUMENT v3.2.0.727

Subsequent Event (Details) AUD in Thousands, $ in Thousands	1 Months Ended				3 Months Ended	6 Months Ended
	Jul. 31, 2015 AUD	Jul. 31, 2015 USD ($)	Jun. 30, 2015 AUD	Jun. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)
R&D tax incentive refund			AUD 7,562	$ 5,863	$ 5,863	$ 5,863
Subsequent Event [Member]
R&D tax incentive refund	AUD 5,900	$ 4,300

X

- Definition

A tax incentive credit or grant from a government or taxing authority for research and development activity.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: