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Convertible Loan, Related Party - Schedule of Issuance of Common Stock for Settlement of Interest Expense, Commitment Fees and Establishment Fee (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Shares of common stock issued, Amount	$ 1,038URRE_NumberOfCommonStockSharesIssuedValueDuringPeriodForSettlementOfDebt
Shares of common stock issued, Shares	428,765URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt
Establishment Fee [Member]
Shares of common stock issued, Amount	300URRE_NumberOfCommonStockSharesIssuedValueDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_EstablishmentFeeMember
Shares of common stock issued, Shares	117,188URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_EstablishmentFeeMember
Volume Weighted Average Price	$ 2.5600URRE_VolumeWeightedAveragePrice / us-gaap_DebtInstrumentAxis = URRE_EstablishmentFeeMember
Date of Issuance	Feb. 04, 2014
Interest Payment and Commitment Fee [Member]
Shares of common stock issued, Amount	63URRE_NumberOfCommonStockSharesIssuedValueDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentAndCommitmentFeeMember
Shares of common stock issued, Shares	21,218URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentAndCommitmentFeeMember
Volume Weighted Average Price	$ 2.9731URRE_VolumeWeightedAveragePrice / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentAndCommitmentFeeMember
Date of Issuance	Feb. 04, 2014
Interest Payment and Commitment Fee One [Member]
Shares of common stock issued, Amount	138URRE_NumberOfCommonStockSharesIssuedValueDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentAndCommitmentFeeOneMember
Shares of common stock issued, Shares	45,737URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentAndCommitmentFeeOneMember
Volume Weighted Average Price	$ 3.0209URRE_VolumeWeightedAveragePrice / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentAndCommitmentFeeOneMember
Date of Issuance	Apr. 10, 2014
Interest Payment and Commitment Fee Two [Member]
Shares of common stock issued, Amount	175URRE_NumberOfCommonStockSharesIssuedValueDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentAndCommitmentFeeTwoMember
Shares of common stock issued, Shares	69,233URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentAndCommitmentFeeTwoMember
Volume Weighted Average Price	$ 2.6561URRE_VolumeWeightedAveragePrice / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentAndCommitmentFeeTwoMember
Date of Issuance	Jul. 25, 2014
Interest Payment [Member]
Shares of common stock issued, Amount	164URRE_NumberOfCommonStockSharesIssuedValueDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentMember
Shares of common stock issued, Shares	72,477URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentMember
Volume Weighted Average Price	$ 2.7595URRE_VolumeWeightedAveragePrice / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentMember
Date of Issuance	Oct. 02, 2014
Interest Payment One [Member]
Shares of common stock issued, Amount	$ 198URRE_NumberOfCommonStockSharesIssuedValueDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentOneMember
Shares of common stock issued, Shares	102,912URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentOneMember
Volume Weighted Average Price	$ 1.9434URRE_VolumeWeightedAveragePrice / us-gaap_DebtInstrumentAxis = URRE_InterestPaymentOneMember
Date of Issuance	Jan. 02, 2015

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