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v2.4.1.9

Federal Income Taxes - Schedule of Components of Future Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Income Tax Disclosure [Abstract] |  |
Net operating loss carryforwards | $ 71,882 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | $ 63,539 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Mineral properties | 11,375 URRE_DeferredTaxAssetsMineralPropertiesNoncurrent | 14,153 URRE_DeferredTaxAssetsMineralPropertiesNoncurrent
Equipment & Furniture | 133 us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment | 127 us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment
Restoration Reserves | 1,360 URRE_DeferredTaxAssetsRestorationReservesNoncurrent | 1,303 URRE_DeferredTaxAssetsRestorationReservesNoncurrent
Stock-based compensation | 199 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits |
Derivatives |  | 37 us-gaap_DeferredTaxAssetsDerivativeInstruments
Deferred tax assets | 84,949 us-gaap_DeferredTaxAssetsGrossNoncurrent | 79,159 us-gaap_DeferredTaxAssetsGrossNoncurrent
Valuation allowance | (82,435)us-gaap_DeferredTaxAssetsValuationAllowanceNoncurrent | (78,544)us-gaap_DeferredTaxAssetsValuationAllowanceNoncurrent
Net | 2,514 us-gaap_DeferredTaxAssetsNetNoncurrent | 615 us-gaap_DeferredTaxAssetsNetNoncurrent
Prepaids and other | 100 us-gaap_DeferredTaxLiabilitiesPrepaidExpenses | 50 us-gaap_DeferredTaxLiabilitiesPrepaidExpenses
Deferred tax liabilities current | 100 us-gaap_DeferredTaxLiabilitiesCurrent | 50 us-gaap_DeferredTaxLiabilitiesCurrent
Equipment & Furniture | (956)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment |
Derivatives | (1,658)us-gaap_DeferredTaxLiabilitiesDerivatives | (665)us-gaap_DeferredTaxLiabilitiesDerivatives
Deferred tax liabilities noncurrent | (2,614)us-gaap_DeferredTaxLiabilitiesNoncurrent | (665)us-gaap_DeferredTaxLiabilitiesNoncurrent
Deferred tax liabilities | (2,514)us-gaap_DeferredTaxLiabilities | (615)us-gaap_DeferredTaxLiabilities
Net deferred tax asset (liability) |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from derivative instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31917-109318 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31931-109318 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31928-109318 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e31958-109318 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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