Quarterly report pursuant to Section 13 or 15(d)

Notes Payable - Current and Long-term (Details)

v2.4.1.9
Notes Payable - Current and Long-term (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Current debt    
Long-Term Debt, Current Maturities $ 10,934us-gaap_LongTermDebtCurrent $ 7,374us-gaap_LongTermDebtCurrent
Long term debt    
Long-Term Debt, Excluding Current Maturities 27,812us-gaap_LongTermDebtNoncurrent 33,193us-gaap_LongTermDebtNoncurrent
Sweetwater IDR Bond [Member]    
Current debt    
Long-Term Debt, Current Maturities 4,184us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember 		4,124us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
Long term debt    
Long-Term Debt, Excluding Current Maturities 27,812us-gaap_LongTermDebtNoncurrent
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember 		28,881us-gaap_LongTermDebtNoncurrent
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
RMBAH First Loan Facility [Member]    
Current debt    
Long-Term Debt, Current Maturities 6,750us-gaap_LongTermDebtCurrent
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember 		3,250us-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