SUBSEQUENT EVENT (Detail) (Subsequent event, Uranco, Rio Grande Resources)	0 Months Ended
Nov. 06, 2014 item
Subsequent event \| Uranco \| Rio Grande Resources
Subsequent event
Number of parcels	2

Represents the number of parcels comprising mineral properties of the entity.

No definition available.

Name:	urre_NumberOfParcelsComprisingMineralProperty
Namespace Prefix:	urre_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration