XML 14 R1.htm IDEA: XBRL DOCUMENT v3.21.2
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2021
Oct. 20, 2021
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2021  
Entity File Number 001-9025  
Entity Registrant Name VISTA GOLD CORP.  
Entity Incorporation, State or Country Code A1  
Entity Tax Identification Number 98-0542444  
Entity Address, Address Line One 7961 Shaffer Parkway, 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  
Title of 12(b) Security Common Shares  
Trading Symbol VGZ  
Security Exchange Name NYSEAMER  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   117,189,232
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0000783324  
Amendment Flag false