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Stockholders' Equity (Details Narrative) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended | 6 Months Ended | 3 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Apr. 15, 2014 | Oct. 06, 2014 | Aug. 08, 2014 | Jul. 02, 2014 | Oct. 31, 2011 | Jan. 31, 2013 | Feb. 12, 2014
Issuance of common stock, shares | 428,765 us-gaap_StockIssuedDuringPeriodSharesNewIssues |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ 11,880 us-gaap_ProceedsFromIssuanceOfCommonStock | $ 3,600 us-gaap_ProceedsFromIssuanceOfCommonStock |  |  |  |  |  |  |  |  |
Payment of interest |  | 11 us-gaap_InterestPaid |  |  |  |  |  |  |  |  |
Common stock repurchased during period, value | (249)us-gaap_StockRepurchasedDuringPeriodValue |  |  |  |  |  |  |  |  |  |
Rights Offering [Member] |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock entitled to be purchased for each subscription right |  |  | 0.3119 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight / us-gaap_ClassOfWarrantOrRightAxis = URRE_RightsOfferingMember |  |  |  |  |  |  |  |
Exercise price per share |  |  | $ 2.55 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 / us-gaap_ClassOfWarrantOrRightAxis = URRE_RightsOfferingMember |  |  |  |  |  |  |  |
Rights Offering [Member] | Resource Capital Fund V LP [Member] |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock, shares |  |  | 31,343 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_ClassOfWarrantOrRightAxis = URRE_RightsOfferingMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_ResourceCapitalFundVLPMember |  |  |  |  |  |  |  |
Proceeds from short term bridge loan payable |  |  | 8,900 us-gaap_ProceedsFromConstructionLoansPayable / us-gaap_ClassOfWarrantOrRightAxis = URRE_RightsOfferingMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_ResourceCapitalFundVLPMember |  |  |  |  |  |  |  |
Repayment of short term bridge loan payable |  |  | 5,000 us-gaap_RepaymentsOfConstructionLoansPayable / us-gaap_ClassOfWarrantOrRightAxis = URRE_RightsOfferingMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_ResourceCapitalFundVLPMember |  |  |  |  |  |  |  |
Payment of interest |  |  | 96 us-gaap_InterestPaid / us-gaap_ClassOfWarrantOrRightAxis = URRE_RightsOfferingMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_ResourceCapitalFundVLPMember |  |  |  |  |  |  |  |
Loan Agreement One [Member] | Resource Capital Fund V LP [Member] |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock, shares | 325,853 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_ResourceCapitalFundVLPMember / us-gaap_TypeOfArrangementAxis = URRE_LoanAgreementOneMember |  |  | 102,912 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_ResourceCapitalFundVLPMember / us-gaap_TypeOfArrangementAxis = URRE_LoanAgreementOneMember |  |  |  |  |  |  |
Payment of interest | 840 us-gaap_InterestPaid / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_ResourceCapitalFundVLPMember / us-gaap_TypeOfArrangementAxis = URRE_LoanAgreementOneMember |  |  | 198 us-gaap_InterestPaid / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_ResourceCapitalFundVLPMember / us-gaap_TypeOfArrangementAxis = URRE_LoanAgreementOneMember |  |  |  |  |  |  |
Settlement Agreement and General Release [Member] | Former Executive [Member] |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock, shares |  |  |  |  | 119,231 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_TitleOfIndividualAxis = URRE_FormerExecutiveMember / us-gaap_TypeOfArrangementAxis = URRE_SettlementAgreementAndGeneralReleaseMember |  |  |  |  |  |
Equity price per share |  |  |  |  | $ 2.80 us-gaap_EquityIssuancePerShareAmount / us-gaap_TitleOfIndividualAxis = URRE_FormerExecutiveMember / us-gaap_TypeOfArrangementAxis = URRE_SettlementAgreementAndGeneralReleaseMember |  |  |  |  |  |
Proceeds from issuance of common stock |  |  |  |  | 334 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_TitleOfIndividualAxis = URRE_FormerExecutiveMember / us-gaap_TypeOfArrangementAxis = URRE_SettlementAgreementAndGeneralReleaseMember |  |  |  |  |  |
Uranium Mining Lease and Agreement [Member] | Juan Tafoya Land Corporation [Member] |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock, shares |  |  |  |  |  |  | 127,359 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_JuanTafoyaLandCorporationMember / us-gaap_TypeOfArrangementAxis = URRE_UraniumMiningLeaseandAgreementMember |  |  |  |
Proceeds from issuance of common stock |  |  |  |  |  |  | 342 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_JuanTafoyaLandCorporationMember / us-gaap_TypeOfArrangementAxis = URRE_UraniumMiningLeaseandAgreementMember |  |  |  |
Payment of base rental |  |  |  |  |  |  | 338 us-gaap_PaymentsForRent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_JuanTafoyaLandCorporationMember / us-gaap_TypeOfArrangementAxis = URRE_UraniumMiningLeaseandAgreementMember |  |  |  |
Common stock repurchased during period, shares |  |  |  |  |  | 91,631 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_JuanTafoyaLandCorporationMember / us-gaap_TypeOfArrangementAxis = URRE_UraniumMiningLeaseandAgreementMember |  |  |  |  |
Common stock repurchased during period, value |  |  |  |  |  | 249 us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = URRE_JuanTafoyaLandCorporationMember / us-gaap_TypeOfArrangementAxis = URRE_UraniumMiningLeaseandAgreementMember |  |  |  |  |
BTIG, LLC [Member] | ATM Sales Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Proceeds from offering price |  |  |  |  |  |  |  | 4,100 us-gaap_ProceedsFromIssuanceInitialPublicOffering / us-gaap_CounterpartyNameAxis = URRE_BTIGLLCMember / us-gaap_TypeOfArrangementAxis = URRE_ATMSalesAgreementMember | 15,000 us-gaap_ProceedsFromIssuanceInitialPublicOffering / us-gaap_CounterpartyNameAxis = URRE_BTIGLLCMember / us-gaap_TypeOfArrangementAxis = URRE_ATMSalesAgreementMember |  |
Percentage of commission to be paid on gross proceeds |  |  |  |  |  |  |  |  | 3.00%URRE_CommissionPercentageOnGrossProceedsFromSaleOfShares / us-gaap_CounterpartyNameAxis = URRE_BTIGLLCMember / us-gaap_TypeOfArrangementAxis = URRE_ATMSalesAgreementMember |  |
Sale of common stock, shares | 794,586 us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction / us-gaap_CounterpartyNameAxis = URRE_BTIGLLCMember / us-gaap_TypeOfArrangementAxis = URRE_ATMSalesAgreementMember |  |  |  |  |  |  |  |  |  |
Proceeds from sales of common stock | 2,600 us-gaap_ProceedsFromIssuanceOrSaleOfEquity / us-gaap_CounterpartyNameAxis = URRE_BTIGLLCMember / us-gaap_TypeOfArrangementAxis = URRE_ATMSalesAgreementMember |  |  |  |  |  |  |  |  |  |
BTIG, LLC [Member] | ATM Sales Agreement [Member] | March 19, 2015 [Member] |  |  |  |  |  |  |  |  |  |  |
Equity securities available for sales |  |  |  |  |  |  |  |  |  |  |
Proceeds from future sale of equity | 15,000 us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity / us-gaap_CounterpartyNameAxis = URRE_BTIGLLCMember / us-gaap_CreationDateAxis = URRE_MarchNineteenTwoThousandFifteenMember / us-gaap_TypeOfArrangementAxis = URRE_ATMSalesAgreementMember |  |  |  |  |  |  |  |  |  |
Cormark Securities Inc [Member] | Neutron Energy Inc [Member] |  |  |  |  |  |  |  |  |  |  |
Equity price per share |  |  |  |  |  |  |  |  |  | $ 3.50 us-gaap_EquityIssuancePerShareAmount / us-gaap_BusinessAcquisitionAxis = URRE_NeutronEnergyIncMember / us-gaap_CounterpartyNameAxis = URRE_CormarkSecuritiesIncMember |
Number of shares issuance for services |  |  |  |  |  |  |  |  |  | 83,200 us-gaap_StockIssuedDuringPeriodSharesIssuedForServices / us-gaap_BusinessAcquisitionAxis = URRE_NeutronEnergyIncMember / us-gaap_CounterpartyNameAxis = URRE_CormarkSecuritiesIncMember |
Business acquisition related fees |  |  |  |  |  |  |  |  |  | 291 us-gaap_BusinessCombinationAcquisitionRelatedCosts / us-gaap_BusinessAcquisitionAxis = URRE_NeutronEnergyIncMember / us-gaap_CounterpartyNameAxis = URRE_CormarkSecuritiesIncMember |
Registered Direct Offering [Member] |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock, shares |  |  |  |  |  |  |  |  |  |  | 3,960,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsidiarySaleOfStockAxis = URRE_RegisteredDirectOfferingMember
Equity price per share |  |  |  |  |  |  |  |  |  |  | $ 2.60 us-gaap_EquityIssuancePerShareAmount / us-gaap_SubsidiarySaleOfStockAxis = URRE_RegisteredDirectOfferingMember
Proceeds from issuance of common stock |  |  |  |  |  |  |  |  |  |  | $ 9,307 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_SubsidiarySaleOfStockAxis = URRE_RegisteredDirectOfferingMember

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- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
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- Definition Amount per share or per unit assigned to the consideration received of equity securities issued for development stage entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 915 -SubTopic 215 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6472370&loc=d3e38297-110927 + Details
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- Definition Cash payments to lessor's for use of assets under operating leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the sale of equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 + Details
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- Definition Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders. + References No definition available. + Details
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- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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