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Mineral Properties (Details) (USD $)
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12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Apr. 30, 2013
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Jun. 30, 2013
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Dec. 31, 2005
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Dec. 31, 2013
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| Stock Issued During Period Value Issued For Royalty Interest | $ 763,000urg_StockIssuedDuringPeriodValueIssuedForRoyaltyInterest | |||||
| Write-off of mineral properties | 483,000us-gaap_AssetImpairmentCharges | 1,430,000us-gaap_AssetImpairmentCharges | ||||
| Lost Creek Property | ||||||
| Royalty (as a percent) |
1.67%urg_RoyaltyOnFutureProductionPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = urg_LostCreekPropertyMember |
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| Number Of Mining Claims |
20urg_NumberOfMiningClaims / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = urg_LostCreekPropertyMember |
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| Stock Issued During Period Shares Issued For Royalty Interest |
1,000,000urg_StockIssuedDuringPeriodSharesIssuedForRoyaltyInterest / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = urg_LostCreekPropertyMember |
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| Stock Issued During Period Value Issued For Royalty Interest |
763,000urg_StockIssuedDuringPeriodValueIssuedForRoyaltyInterest / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = urg_LostCreekPropertyMember |
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| Mining Claims In LC North LC East or LC West | ||||||
| Royalty (as a percent) |
0.00%urg_RoyaltyOnFutureProductionPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = urg_MiningClaimsInLcNorthLcEastOrLcWestMember |
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| South Granite Mountain Project | ||||||
| Write-off of mineral properties |
261,000us-gaap_AssetImpairmentCharges / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = urg_SouthGraniteMountainProjectMember |
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| Mustang Project | ||||||
| Write-off of mineral properties |
1,168,000us-gaap_AssetImpairmentCharges / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = urg_MustangProjectMember |
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| Nfu Wyoming LLC | Lost Creek Property | ||||||
| Percentage of asset acquired |
100.00%urg_MineralPropertiesAcquiredPercentage / us-gaap_BusinessAcquisitionAxis = urg_NfuWyomingLlcMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = urg_LostCreekPropertyMember |
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| Aggregate consideration |
20,000,000us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = urg_NfuWyomingLlcMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = urg_LostCreekPropertyMember |
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| Pathfinder Mines Corporation | ||||||
| Aggregate consideration |
6,700,000us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = urg_PathfinderMinesCorporationMember |
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| Royalty (as a percent) |
5.00%urg_RoyaltyOnFutureProductionPercentage / us-gaap_BusinessAcquisitionAxis = urg_PathfinderMinesCorporationMember |
5.00%urg_RoyaltyOnFutureProductionPercentage / us-gaap_BusinessAcquisitionAxis = urg_PathfinderMinesCorporationMember |
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| Estimated asset reclamation obligation |
5,700,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = urg_PathfinderMinesCorporationMember |
5,700,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = urg_PathfinderMinesCorporationMember |
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| Deferred tax liabilities |
3,300,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = urg_PathfinderMinesCorporationMember |
3,300,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = urg_PathfinderMinesCorporationMember |
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| Mineral properties |
$ 15,300,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = urg_PathfinderMinesCorporationMember |
$ 15,300,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = urg_PathfinderMinesCorporationMember |
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| X | ||||||||||
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- Definition
This element represents that Mineral Properties Acquired Percentage. No definition available.
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| X | ||||||||||
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- Definition
Represents the number of mining claims. No definition available.
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| X | ||||||||||
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- Definition
Represents the percentage of royalty exists with respect to future production of uranium on mining claims. No definition available.
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| X | ||||||||||
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- Definition
Number of shares issued during the period in full consideration of the conveyance and termination of the royalty interest. No definition available.
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| X | ||||||||||
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- Definition
Value of shares issued during the period in full consideration of the conveyance and termination of the royalty interest. No definition available.
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences due after one year or the normal operating cycle, if longer, assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of property, plant, and equipment recognized as of the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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