Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Operating Expenses:
Mineral property expenses	$ (3,502)URRE_MineralPropertyExpenses	$ (5,215)URRE_MineralPropertyExpenses
General and administrative	(9,132)us-gaap_GeneralAndAdministrativeExpense	(9,707)us-gaap_GeneralAndAdministrativeExpense
Accretion of asset retirement obligations	(425)	(390)
Depreciation and amortization	(331)	(448)
Impairment of uranium properties	(160)us-gaap_AssetImpairmentCharges	(4,095)us-gaap_AssetImpairmentCharges
Total operating expenses	(13,550)us-gaap_OperatingExpenses	(19,855)us-gaap_OperatingExpenses
Non-Operating Income/(Expenses):
Gain/(loss) on derivatives	2,919us-gaap_GainLossOnSaleOfDerivatives	(108)us-gaap_GainLossOnSaleOfDerivatives
Interest expense	(2,368)us-gaap_InterestExpense	(408)us-gaap_InterestExpense
Gain on non-monetary exchange of assets	2,313
Other income, net	2us-gaap_OtherIncome	77us-gaap_OtherIncome
Total other income/(expense)	2,866us-gaap_NonoperatingIncomeExpense	(439)us-gaap_NonoperatingIncomeExpense
Net Loss	$ (10,684)us-gaap_NetIncomeLoss	$ (20,294)us-gaap_NetIncomeLoss
BASIC AND DILUTED LOSS PER SHARE	$ (0.44)us-gaap_EarningsPerShareBasicAndDiluted	$ (1.06)us-gaap_EarningsPerShareBasicAndDiluted
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING	24,282,519	19,191,056

Amount of mineral property expenses incurred during the reporting period.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

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The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

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

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Disclosure of the difference in values (gain (loss)) between the nonmonetary assets or liabilities exchanged with another entity inclusive of boot (small monetary consideration).

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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Reflects the sum of all other revenue and income recognized by the entity in the period not otherwise specified in the income statement.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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