Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

v3.3.1.900
Document And Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Feb. 25, 2016
Jun. 30, 2015
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2015    
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY    
Entity Current Reporting Status Yes    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Common Stock, Shares Outstanding   143,323,769  
Entity Public Float     $ 84.2
Entity Registrant Name UR-ENERGY INC    
Entity Central Index Key 0001375205    
Current Fiscal Year End Date --12-31    
Entity Filer Category Accelerated Filer