Quarterly report pursuant to Section 13 or 15(d)

Equity Investment (Details)

v2.4.1.9
Equity Investment (Details)
12 Months Ended
Dec. 31, 2009
Mar. 31, 2015
Schedule of Equity Method Investments [Line Items]    
Project Expenditure Percentage 25.00%urg_ProjectExpenditurePercentage  
Equity Method Investment, Ownership Percentage   19.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
Crosshair Energy Corporation [Member]    
Schedule of Equity Method Investments [Line Items]    
Project Expenditure Percentage 75.00%urg_ProjectExpenditurePercentage
/ dei_LegalEntityAxis
= urg_CrosshairEnergyCorporationMember