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Convertible Loan, Related Party (Details Narrative) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Nov. 13, 2014
Nov. 13, 2013
Apr. 30, 2014
Apr. 29, 2014
Jan. 22, 2013
Line of Credit Facility [Line Items]                
Debt maturity date   Nov. 13, 2014            
Interest expense $ 198us-gaap_InterestExpense $ 2,368us-gaap_InterestExpense $ 408us-gaap_InterestExpense          
Debt conversation price per shares $ 2.60us-gaap_DebtInstrumentConvertibleConversionPrice1 $ 2.60us-gaap_DebtInstrumentConvertibleConversionPrice1            
Amortization of debt discount   1,567us-gaap_AmortizationOfDebtDiscountPremium 87us-gaap_AmortizationOfDebtDiscountPremium          
Common stock, shares outstanding 25,192,669us-gaap_CommonStockSharesOutstanding 25,192,669us-gaap_CommonStockSharesOutstanding 19,820,258us-gaap_CommonStockSharesOutstanding          
Issuance of common stock, shares   428,765URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt            
Loan Agreement [Member]                
Line of Credit Facility [Line Items]                
Debt maturity date   Dec. 31, 2016            
Maximum [Member]                
Line of Credit Facility [Line Items]                
Common stock, shares outstanding               161,100,000us-gaap_CommonStockSharesOutstanding
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= us-gaap_MaximumMember
Minimum [Member]                
Line of Credit Facility [Line Items]                
Common stock, shares outstanding               16,100,000us-gaap_CommonStockSharesOutstanding
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Resource Capital Fund V LP [Member] | Notes Payable, Other Payables [Member]                
Line of Credit Facility [Line Items]                
Debt interest rate 10.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
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= URRE_ResourceCapitalFundVLPMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
10.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
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= URRE_ResourceCapitalFundVLPMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
           
Resource Capital Fund V LP [Member] | Loan Agreement [Member]                
Line of Credit Facility [Line Items]                
Debt maturity date   Dec. 31, 2016            
Percentage of commitment fee paid   1.00%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
           
Percentage of loan establishment fee   2.00%URRE_PercentageOfLoanEstablishmentFee
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= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
           
Loan establishment fee   300us-gaap_LoanProcessingFee
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
           
Prepayment of outstanding loan secured for pledged   5,000us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfMortgageBackedSecuritiesMBS
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= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
           
Debt conversation price per shares $ 2.60us-gaap_DebtInstrumentConvertibleConversionPrice1
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
$ 2.60us-gaap_DebtInstrumentConvertibleConversionPrice1
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= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
           
Equity price per share   $ 1.00us-gaap_EquityIssuancePerShareAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
           
Issuance of common stock, shares   3,076,923URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
           
Resource Capital Fund V LP [Member] | Loan Agreement [Member] | March 19, 2015 [Member]                
Line of Credit Facility [Line Items]                
Debt conversation price per shares       $ 2.60us-gaap_DebtInstrumentConvertibleConversionPrice1
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= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
       
Common stock, shares outstanding       6,900,000us-gaap_CommonStockSharesOutstanding
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= URRE_MarchNineteenTwoThousandFifteenMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
       
Percentage of outstanding common stock       23.50%us-gaap_EquityMethodInvestmentOwnershipPercentage
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= URRE_MarchNineteenTwoThousandFifteenMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
       
Debt conversation amount       8,000us-gaap_DebtConversionOriginalDebtAmount1
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= URRE_MarchNineteenTwoThousandFifteenMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
       
Issuance of common stock, shares       3,076,923URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt
/ us-gaap_CreationDateAxis
= URRE_MarchNineteenTwoThousandFifteenMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
       
Resource Capital Fund V LP [Member] | Loan Agreement [Member] | Period through 29 January 2014 [Member]                
Line of Credit Facility [Line Items]                
Debt interest rate 12.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ URRE_DebtInstrumentPeriodAxis
= URRE_PeriodThroughTwentyNineJanuaryTwoThousandFourteenMember
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= URRE_LoanAgreementMember
12.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
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= URRE_PeriodThroughTwentyNineJanuaryTwoThousandFourteenMember
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= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
           
Resource Capital Fund V LP [Member] | Advanced Tranche [Member] | Senior Secured Loan Facility [Member]                
Line of Credit Facility [Line Items]                
Proceeds from borrowings         3,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_DebtInstrumentAxis
= URRE_AdvancedTrancheMember
/ us-gaap_LongtermDebtTypeAxis
= URRE_SeniorSecuredLoanFacilityMember
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Resource Capital Fund V LP [Member] | Maximum [Member] | Loan Agreement [Member]                
Line of Credit Facility [Line Items]                
Percentage of outstanding common stock 30.60%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
30.60%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
           
Resource Capital Fund V LP [Member] | Secured Convertible Loan Facility [Member] | Three Tranche [Member]                
Line of Credit Facility [Line Items]                
Proceeds from borrowings         5,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_CreditFacilityAxis
= URRE_SecuredConvertibleLoanFacilityMember
/ us-gaap_DebtInstrumentAxis
= URRE_ThreeTrancheMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
     
Resource Capital Fund V LP [Member] | Secured Convertible Loan Facility [Member] | First Tranche [Member]                
Line of Credit Facility [Line Items]                
Proceeds from borrowings         5,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_CreditFacilityAxis
= URRE_SecuredConvertibleLoanFacilityMember
/ us-gaap_DebtInstrumentAxis
= URRE_FirstTrancheMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= URRE_ResourceCapitalFundVLPMember
     
Line of credit remaining amount         2,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
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= URRE_SecuredConvertibleLoanFacilityMember
/ us-gaap_DebtInstrumentAxis
= URRE_FirstTrancheMember
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Resource Capital Fund V LP [Member] | Secured Convertible Loan Facility [Member] | Final Tranche [Member] | Loan Agreement [Member]                
Line of Credit Facility [Line Items]                
Proceeds from borrowings           3,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_CreditFacilityAxis
= URRE_SecuredConvertibleLoanFacilityMember
/ us-gaap_DebtInstrumentAxis
= URRE_FinalTrancheMember
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/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
   
Resource Capital Fund V LP [Member] | Secured Convertible Loan Facility [Member] | Receipt of AdvanceTranche [Member] | Loan Agreement [Member]                
Line of Credit Facility [Line Items]                
Proceeds from borrowings   8,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_CreditFacilityAxis
= URRE_SecuredConvertibleLoanFacilityMember
/ us-gaap_DebtInstrumentAxis
= URRE_ReceiptofAdvanceTrancheMember
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= URRE_ResourceCapitalFundVLPMember
/ us-gaap_TypeOfArrangementAxis
= URRE_LoanAgreementMember
           
Resource Capital Fund V LP [Member] | Secured Convertible Loan Facility [Member] | Maximum [Member]                
Line of Credit Facility [Line Items]                
Maximum borrowing capacity         15,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
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= us-gaap_MaximumMember
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Resource Capital Fund V LP [Member] | Secured Convertible Loan Facility [Member] | Maximum [Member] | Loan Agreement [Member]                
Line of Credit Facility [Line Items]                
Line of credit fee available             15,000us-gaap_LineOfCreditFacilityCommitmentFeeAmount
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Resource Capital Fund V LP [Member] | Secured Convertible Loan Facility [Member] | Minimum [Member] | Loan Agreement [Member]                
Line of Credit Facility [Line Items]                
Line of credit fee available             $ 8,000us-gaap_LineOfCreditFacilityCommitmentFeeAmount
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