Annual report pursuant to Section 13 and 15(d)

Inventory (Details)

v2.4.1.9
Inventory (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Inventory    
Inventory, Net, Total $ 5,168us-gaap_InventoryNet $ 2,053us-gaap_InventoryNet
Inventory Valuation Reserves 0us-gaap_InventoryValuationReserves  
In Process Inventory [Member]    
Inventory    
Inventory, Net, Total 2,084us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= urg_InProcessInventoryMember
765us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= urg_InProcessInventoryMember
Plant Inventory [Member]    
Inventory    
Inventory, Net, Total 882us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= urg_PlantInventoryMember
1,136us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= urg_PlantInventoryMember
Conversion Facility Inventory [Member]    
Inventory    
Inventory, Net, Total $ 2,202us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= urg_ConversionFacilityInventoryMember
$ 152us-gaap_InventoryNet
/ us-gaap_PublicUtilitiesInventoryAxis
= urg_ConversionFacilityInventoryMember