Consolidated Statements of Cash Flows and Supplemental Cash Flow Information (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Operating activities:
Net loss	$ (10,684)us-gaap_NetIncomeLoss	$ (20,294)us-gaap_NetIncomeLoss
Reconciliation of net loss to cash used in operations:
Accretion of asset retirement obligations	425	390
Amortization of debt discount	1,567	87
Amortization of debt issuance costs	100URRE_AmortizationOfDebtIssuanceCosts
Change in fair value of derivative liability	(2,919)	108
Decrease in restoration and reclamation accrual	(96)	(1,638)
Depreciation and amortization	331us-gaap_Depreciation	448us-gaap_Depreciation
Gain on non-monetary exchange of assets	(2,313)
Impairment of uranium properties	160us-gaap_AssetImpairmentCharges	4,095us-gaap_AssetImpairmentCharges
Stock compensation expense	1,031us-gaap_ShareBasedCompensation	381us-gaap_ShareBasedCompensation
Common stock issued for land obligation	342
Loss on disposal of fixed assets	18us-gaap_GainLossOnDispositionOfAssets
Other non-cash items, net	23us-gaap_OtherNoncashIncomeExpense	113us-gaap_OtherNoncashIncomeExpense
Effect of changes in operating working capital items:
Decrease in receivables	37us-gaap_IncreaseDecreaseInReceivables	229us-gaap_IncreaseDecreaseInReceivables
Increase in prepaid and other current assets	(231)	(207)
Increase in payables, accrued liabilities and deferred credits	203	948
Net cash used in operating activities	(12,006)	(15,340)
Cash flows from investing activities:
Reduction in restricted cash		5,481
Additions to uranium properties		(174)
Purchases of equipment	(55)
Proceeds from disposal of property, plant and equipment	4
Net cash provided by/(used in) investing activities	(51)	5,307
Cash flows from financing activities:
Proceeds from convertible loan	5,000us-gaap_ProceedsFromConvertibleDebt	3,000us-gaap_ProceedsFromConvertibleDebt
Payments on borrowings	(11)us-gaap_ProceedsFromRepaymentsOfDebt	(116)us-gaap_ProceedsFromRepaymentsOfDebt
Issuance of common stock, net	11,880	3,600
Purchase of treasury stock	(249)
Payment of minimum withholding taxes on net share settlements of equity awards	(110)
Net cash provided by financing activities	16,510	6,484
Net increase/(decrease) in cash and cash equivalents	4,453	(3,549)
Cash and cash equivalents, beginning of period	1,117	4,666
Cash and cash equivalents, end of period	5,570	1,117
Cash paid during the period for:
Interest		11us-gaap_InterestPaid
Supplemental non-cash information with respect to investing and financing activities:
Common stock issued for payment of convertible loan fees and interest	840
Common stock issued for repayment of short-term loan principal and interest		5,096
Common stock issued for the settlement of litigation	334
Common stock issued for services		291URRE_CommonStockIssuedForServices
Total non-cash investing and financing activities for the period	$ 1,174URRE_NonCashTransactionsNet	$ 5,387URRE_NonCashTransactionsNet

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The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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