Annual report pursuant to Section 13 and 15(d)

Notes Payable - Current vs Long-term (Details)

v2.4.1.9
Notes Payable - Current vs Long-term (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Current debt    
Long-Term Debt, Current Maturities $ 7,374us-gaap_LongTermDebtCurrent $ 5,153us-gaap_LongTermDebtCurrent
Long term debt    
Long-Term Debt, Excluding Current Maturities 33,193us-gaap_LongTermDebtNoncurrent 34,000us-gaap_LongTermDebtNoncurrent
Sweetwater IDR Bond [Member]    
Current debt    
Long-Term Debt, Current Maturities 4,124us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember 		 
Long term debt    
Long-Term Debt, Excluding Current Maturities 28,881us-gaap_LongTermDebtNoncurrent
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember 		34,000us-gaap_LongTermDebtNoncurrent
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
RMBAH First Loan Facility [Member]    
Current debt    
Long-Term Debt, Current Maturities 3,250us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember 		5,000us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
Long term debt    
Long-Term Debt, Excluding Current Maturities 4,312us-gaap_LongTermDebtNoncurrent
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember 		 
Insurance premium financing [Member]    
Current debt    
Long-Term Debt, Current Maturities   $ 153us-gaap_LongTermDebtCurrent
/ us-gaap_ShortTermDebtTypeAxis
= urg_InsurancePremiumFinancingMember