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Stock Based Compensation (Details Narrative) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended 1 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock compensation expense $ 1,031us-gaap_ShareBasedCompensation $ 381us-gaap_ShareBasedCompensation  
2013 Omnibus Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of common stock shares reserved for future issuance 646,180us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardTypeAxis
= URRE_TwoThousandThirteenOmnibusIncentivePlanMember
   
Shares vested grant date fair value     $ 192us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= URRE_TwoThousandThirteenOmnibusIncentivePlanMember
2013 Omnibus Incentive Plan [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of common stock shares reserved for future issuance 1,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardTypeAxis
= URRE_TwoThousandThirteenOmnibusIncentivePlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Employee stock options maximum vesting term 10 years    
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost from unvested stock options 83us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
   
Weighted average period of unvested stock options 1 year 5 months 9 days    
Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost from unvested stock options 860us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
/ us-gaap_AwardTypeAxis
= URRE_RestrictedStockUnitsMember
   
Weighted average period of unvested stock options 2 years 2 months 9 days    
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares vested grant date fair value $ 2.61us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
$ 3.31us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
 
Unrecognized compensation cost from unvested stock options $ 57us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
   
Weighted average period of unvested stock options 11 months 27 days