Amount of capitalized acquisition cost incurred during period and excluded from amortization for oil- and gas-producing activities accounted for under full cost method. Excludes exploration and development costs and capitalized interest.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 932
-SubTopic 360
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477385/932-360-S50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 932
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-10(c)(7)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479664/932-10-S99-1

+ Details

Name:	us-gaap_AcquisitionCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Mineral properties, net of adjustments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 10
-Topic 360
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

+ Details

Name:	us-gaap_MineralPropertiesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

+ Details

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

- Definition

The amount of mineral property costs derecognized during the period upon recognition of gain on grant of royalty interest.

+ References

No definition available.

+ Details

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

- Definition

The cash outflow for development of mining properties.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=vgz_MtToddAustraliaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Mineral Properties - Mt. Todd, Northern Territory, Australia (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended
	Jun. 30, 2024	Mar. 31, 2006	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Mineral Properties, Net			$ 1,070		$ 920
Capitalization of mine development costs			150	$ 504
Mt Todd, Australia
Property, Plant and Equipment [Line Items]
Mineral Properties, Net			1,070		$ 920
Acquisition Costs, Period Cost		$ 2,146
Capitalization of mine development costs			$ 150	$ 504
Mineral Property Costs Derecognized	$ 3,091