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DESCRIPTION OF BUSINESS (Details) | 6 Months Ended
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Jun. 30, 2013 item
DESCRIPTION OF BUSINESS |
Number of licensed processing facilities | 2
Maximum uranium entity licensed to produce (in pounds per year) | 3,000,000
Period over which properties were acquired | 20 years
Number of properties currently in production | 0

X
- Definition Represents maximum number of pounds of metal per year the NRC license authorizes the entity to produce. + References No definition available. + Details
Name: | urre_NRCLicenseToProduceMetalAnnualMaximum
Namespace Prefix: | urre_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of licensed processing facilities held by the entity during the reporting period. + References No definition available. + Details
Name: | urre_NumberOfLicensedProcessingFacilities
Namespace Prefix: | urre_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of properties which are currently in production. + References No definition available. + Details
Name: | urre_NumberOfPropertiesCurrentlyInProduction
Namespace Prefix: | urre_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period over which properties were acquired by the entity. + References No definition available. + Details
Name: | urre_PeriodOverWhichPropertiesWereAcquired
Namespace Prefix: | urre_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration