Annual report pursuant to Section 13 and 15(d)

Notes Payable - Maturity table (Details)

v2.4.1.9
Notes Payable - Maturity table (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Notes Payable  
Total $ 48,277,000us-gaap_DebtInstrumentPeriodicPayment
Sweetwater IDR Bond [Member]  
Notes Payable  
Principal 33,005,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
Interest 7,052,000us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
Debt Instrument, Maturity Date Oct. 01, 2021
RMBAH First Loan Facility [Member]  
Notes Payable  
Principal 7,562,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
Interest 658,000us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
Debt Instrument, Maturity Date Mar. 31, 2016
2015  
Notes Payable  
Total 9,746,000us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_YearOneMember
2015 | Sweetwater IDR Bond [Member]  
Notes Payable  
Principal 4,124,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearOneMember
Interest 1,810,000us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearOneMember
2015 | RMBAH First Loan Facility [Member]  
Notes Payable  
Principal 3,250,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
/ urg_YearAxis
= urg_YearOneMember
Interest 562,000us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
/ urg_YearAxis
= urg_YearOneMember
2016  
Notes Payable  
Total 10,343,000us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_YearTwoMember
2016 | Sweetwater IDR Bond [Member]  
Notes Payable  
Principal 4,367,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearTwoMember
Interest 1,568,000us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearTwoMember
2016 | RMBAH First Loan Facility [Member]  
Notes Payable  
Principal 4,312,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
/ urg_YearAxis
= urg_YearTwoMember
Interest 96,000us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_RmbahFirstLoanFacilityMember
/ urg_YearAxis
= urg_YearTwoMember
2017  
Notes Payable  
Total 5,934,000us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_YearThreeMember
2017 | Sweetwater IDR Bond [Member]  
Notes Payable  
Principal 4,623,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearThreeMember
Interest 1,311,000us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearThreeMember
2018  
Notes Payable  
Total 5,934,000us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_YearFourMember
2018 | Sweetwater IDR Bond [Member]  
Notes Payable  
Principal 4,895,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearFourMember
Interest 1,039,000us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearFourMember
2019  
Notes Payable  
Total 5,935,000us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_YearFiveMember
2019 | Sweetwater IDR Bond [Member]  
Notes Payable  
Principal 5,183,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearFiveMember
Interest 752,000us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_YearFiveMember
Subsequent Years  
Notes Payable  
Total 10,385,000us-gaap_DebtInstrumentPeriodicPayment
/ urg_YearAxis
= urg_SubsequenttoyearfiveMember
Subsequent Years | Sweetwater IDR Bond [Member]  
Notes Payable  
Principal 9,813,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_SubsequenttoyearfiveMember
Interest $ 572,000us-gaap_DebtInstrumentPeriodicPaymentInterest
/ us-gaap_DebtInstrumentAxis
= urg_SweetwaterIdrBondMember
/ urg_YearAxis
= urg_SubsequenttoyearfiveMember