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Cover
Jul. 29, 2020
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 29, 2020
Entity File Number 1-9025
Entity Registrant Name VISTA GOLD CORP.
Entity Central Index Key 0000783324
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code A1
Entity Address, Address Line One 7961 Shaffer parkway
Entity Address, Address Line Two suite 5
Entity Address, City or Town littleton
Entity Address, State or Province CO
Entity Address, Postal Zip Code 80127
City Area Code 720
Local Phone Number 981-1185
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Shares
Trading Symbol VGZ
Security Exchange Name NYSEAMER
Entity Emerging Growth Company false