Annual report pursuant to Section 13 and 15(d)

Sales (Details)

v2.4.1.9
Sales (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
item
Sales  
Number of Sales Contracts with Delivery Obligations 2urg_NumberOfSalesContractsWithDeliveryObligations
Sales Revenue, Goods, Net $ 29,349us-gaap_SalesRevenueGoodsNet
Concentration Risk, Percentage 100.00%us-gaap_ConcentrationRiskPercentage1
Company A [Member]  
Sales  
Sales Revenue, Goods, Net 10,123us-gaap_SalesRevenueGoodsNet
/ dei_LegalEntityAxis
= urg_CompanyMember
Concentration Risk, Percentage 34.50%us-gaap_ConcentrationRiskPercentage1
/ dei_LegalEntityAxis
= urg_CompanyMember
Company B [Member]  
Sales  
Sales Revenue, Goods, Net 9,199us-gaap_SalesRevenueGoodsNet
/ dei_LegalEntityAxis
= urg_CompanyBMember
Concentration Risk, Percentage 31.40%us-gaap_ConcentrationRiskPercentage1
/ dei_LegalEntityAxis
= urg_CompanyBMember
Company C [Member]  
Sales  
Sales Revenue, Goods, Net 7,197us-gaap_SalesRevenueGoodsNet
/ dei_LegalEntityAxis
= urg_CompanyCMember
Concentration Risk, Percentage 24.50%us-gaap_ConcentrationRiskPercentage1
/ dei_LegalEntityAxis
= urg_CompanyCMember
Company A,B and C [Member]  
Sales  
Sales Revenue, Goods, Net 2,507us-gaap_SalesRevenueGoodsNet
/ dei_LegalEntityAxis
= urg_CompanyAndBMember
Concentration Risk, Percentage 8.50%us-gaap_ConcentrationRiskPercentage1
/ dei_LegalEntityAxis
= urg_CompanyAndBMember
Disposal fees $ 323urg_DisposalFees
/ dei_LegalEntityAxis
= urg_CompanyAndBMember
Disposal Fees Concentration Risk Percentage 1.10%urg_DisposalFeesConcentrationRiskPercentage
/ dei_LegalEntityAxis
= urg_CompanyAndBMember