Amortization of debt discount and commitment fee.

No definition available.

Name:	URRE_AmortizationOfDebtDiscountAndCommitmentFee
Namespace Prefix:	URRE_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of common stock shares issued during period for settlement of debt.

+ References

No definition available.

+ Details

Name:	URRE_NumberOfCommonStockSharesIssuedDuringPeriodForSettlementOfDebt
Namespace Prefix:	URRE_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Stock Issued During Period Shares Issued For Settlement Of Interest Expense.

+ References

No definition available.

+ Details

Name:	URRE_StockIssuedDuringPeriodSharesIssuedForSettlementOfInterestExpense
Namespace Prefix:	URRE_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Stock Issued During Period Value Issued For Settlement Of Interest Expense.

+ References

No definition available.

+ Details

Name:	URRE_StockIssuedDuringPeriodValueIssuedForSettlementOfInterestExpense
Namespace Prefix:	URRE_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

+ Details

Name:	us-gaap_DebtConversionOriginalDebtAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

+ Details

Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of the fee for available but unused credit capacity under the credit facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_TypeOfArrangementAxis=URRE_LoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=URRE_ResourceCapitalFundVLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=URRE_ResourceCapitalFundVLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreationDateAxis=URRE_MayElevenTwoThousandSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=URRE_SecuredConvertibleLoanFacilityMember
Namespace Prefix:
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Period Type:

Convertible Loan, Related Party (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Jan. 04, 2016	Apr. 29, 2014	Mar. 31, 2016	Dec. 31, 2015	Mar. 07, 2016	Nov. 13, 2013
Line of Credit Facility [Line Items]
Number of common stock shares issued for settlement of interest expense	38,086
Number of common stock issued for settlement of interest expense				$ 200
Interest expense			$ 200
Amortization of debt discount and commitment fee			$ 500
Common stock, shares outstanding			5,236,434	4,522,186
Loan Agreement [Member] \| Resource Capital Fund V LP [Member]
Line of Credit Facility [Line Items]
Debt maturity date			Dec. 31, 2016
Debt interest rate			10.00%
Debt conversation price per shares			$ 31.20
Maximum [Member]
Line of Credit Facility [Line Items]
Common stock, shares outstanding					61,800,000
Minimum [Member]
Line of Credit Facility [Line Items]
Common stock, shares outstanding					5,200,000
Resource Capital Fund V LP [Member] \| May 11, 2016 [Member]
Line of Credit Facility [Line Items]
Common stock, shares outstanding			718,137
Percentage of outstanding stock			12.40%
Debt conversation amount			$ 8,000
Issuance of common stock, shares			256,410
Resource Capital Fund V LP [Member] \| Maximum [Member] \| May 11, 2016 [Member]
Line of Credit Facility [Line Items]
Percentage of outstanding stock			16.20%
Resource Capital Fund V LP [Member] \| Secured Convertible Loan Facility [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity						$ 15,000
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		$ 15,000
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		$ 8,000