Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information - shares
6 Months Ended
Jun. 30, 2020
Jul. 30, 2020
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2020  
Entity File Number 001-33905  
Entity Registrant Name UR-ENERGY INC  
Entity Incorporation, State or Country Code Z4  
Entity Tax Identification Number 00-0000000  
Entity Address, Address Line One 10758 West Centennial Road, Suite 200  
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 981-4588  
Title of 12(b) Security Common stock  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   160,478,059
Entity Central Index Key 0001375205  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Document Information [Line Items]    
Trading Symbol URG  
Security Exchange Name NYSEAMER  
Document Information [Line Items]    
Trading Symbol URE