Represents the additional area of land in which mineral fee interest is acquired by entity.

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- Definition

Amount used in the calculation of recoverable reserve payment per unit.

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No definition available.

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Represents the area of land in which mineral fee interest is acquired by entity.

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No definition available.

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- Definition

Book value exceeds net realizable sales value.

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No definition available.

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- Definition

Declining in uranium market price write down.

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Represents the distance of mineral property from a specified location.

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No definition available.

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- Definition

Represents the period of feasibility study.

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Represents the amount of the initial payments per the lease agreement.

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No definition available.

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Lease expiration date description.

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No definition available.

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Lease hold Annual Base Rent.

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Leasehold Annual Rental Payment Per Acre.

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Maintenance Costs Per Claim.

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No definition available.

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Gross area on mineral leases.

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No definition available.

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Net area on mineral leases.

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No definition available.

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Amount of mineral property expenses incurred during the reporting period.

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No definition available.

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MIneral rights gross.

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Mineral rights net.

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Mineral Sales Price Per Pound.

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Number of area cover under leases fee.

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

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Number of unpatented lode mining claims.

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- Definition

Represents the percentage interest earned by third parties based on investment in the project.

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No definition available.

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Represents the percentage interest earned based on investment in the project.

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Represents the percentage of the mineral fee interest the entity owns on additional acres.

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Represents the percentage of overriding royalty obligation payable by the entity.

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Percentage of royalties on lease of sales.

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Represents the percentage of the section the entity holds mineral rights.

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Represents the amount of deduction to the recoverable reserve payment.

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Reduction of Market Value Per Pound.

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Remaining Asset Impairement Charges.

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Represents the royalty payable on lease as a percentage of mineral sales held by third parties.

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Unproved uranium assets during period.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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The current period expense charged against earnings on decontaminating and decommissioning of facilities used in the normal conduct of business and not intended for resale to allocate or recognize the cost of the assets over their useful lives.

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No definition available.

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Area of land held.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties.

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The amount of asset retirement costs previously incurred and capitalized separately from the capitalized amount of the associated long-lived assets.

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Cash payments to lessor's for use of assets under operating leases.

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Amount of asset related to consideration paid in advance for royalties that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Property, Plant and Equipment (Details Narrative) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 05, 2014 Trench
Property, Plant and Equipment [Line Items]
Impairment charge on uranium plant equipment	$ 160us-gaap_AssetImpairmentCharges	$ 4,095us-gaap_AssetImpairmentCharges
Net carrying value of plant equipment after impairment	32,730us-gaap_PropertyPlantAndEquipmentNet	30,841us-gaap_PropertyPlantAndEquipmentNet
Plant equipment book value	98,454us-gaap_PropertyPlantAndEquipmentGross	96,407us-gaap_PropertyPlantAndEquipmentGross
Mineral property expenses	3,502URRE_MineralPropertyExpenses	5,215URRE_MineralPropertyExpenses
Kingsville Dome [Member]
Property, Plant and Equipment [Line Items]
Net carrying value of plant equipment after impairment	461
Plant equipment book value	2,461
Liability related to dismantling and decontaminating	2,000
Book value exceeds net realizable sales value	461
Capitalized asset retirement obligation costs	684
Gross area on mineral leases	2,434
Net area on mineral leases	2,227
Lease expiration date description	ranging from 2000 to 2007.
Remaining asset impairement charges	80
Kingsville Dome [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	6.25%
Annual per acre royalty payable	$ 10
Kingsville Dome [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	9.375%
Annual per acre royalty payable	$ 30
Rosita Project [Member]
Property, Plant and Equipment [Line Items]
Impairment charge on uranium plant equipment		2,821
Declining in uranium market price write down		3,331
Mineral property expenses	817	508
Gross area on mineral leases	3,377
Net area on mineral leases	3,377
Ambrosia Lake Project [Member]
Property, Plant and Equipment [Line Items]
Impairment charge on uranium plant equipment		512
Declining in uranium market price write down		0
Rosita South Property [Member]
Property, Plant and Equipment [Line Items]
Gross area on mineral leases	1,795
Net area on mineral leases	1,479
Rosita Project and Rosita South Property [Member]
Property, Plant and Equipment [Line Items]
Lease expiration date description	extending out to 2015
Rosita Project and Rosita South Property [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	6.25%
Annual per acre royalty payable	$ 10
Rosita Project and Rosita South Property [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	18.25%
Annual per acre royalty payable	$ 30
Mineral sales price per pound	$ 80.00
Vasquez Project [Member]
Property, Plant and Equipment [Line Items]
Impairment charge on uranium plant equipment		276
Mineral property expenses	518	120
Capitalized asset retirement obligation costs	684
Gross area on mineral leases	872
Net area on mineral leases	872
Lease expiration date description	expired in February 2008
Vasquez Project [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	6.25%
Mineral sales price per pound	$ 25.00
Vasquez Project [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	10.25%
Mineral sales price per pound	$ 40.00
Alta Mesa Este Exploration Project [Member]
Property, Plant and Equipment [Line Items]
Mineral property expenses	11
Percentage of royalties on lease of sales	10.00%
Number of area cover under leases fee	6
Gross area on mineral rights	2,916
Net area on mineral rights	2,841
Alta Mesa Este Exploration Project [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Annual per acre royalty payable	$ 20
Alta Mesa Este Exploration Project [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Annual per acre royalty payable	$ 50
Butler Ranch Exploration Project [Member]
Property, Plant and Equipment [Line Items]
Mineral property expenses	32
Gross area on mineral leases	2,653
Net area on mineral leases	2,592
Percentage of royalties on lease of sales	10.00%
Number of area cover under leases fee	9
Butler Ranch Exploration Project [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Annual per acre royalty payable	$ 10
Lease term	8 years
Butler Ranch Exploration Project [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Annual per acre royalty payable	$ 25
Lease term	10 years
Sejita Dome Exploration Project [Member]
Property, Plant and Equipment [Line Items]
Mineral property expenses
Gross area on mineral leases	3,263
Net area on mineral leases	2,176
Number of area cover under leases fee	15
Sejita Dome Exploration Project [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	4.50%
Annual per acre royalty payable	$ 10
Sejita Dome Exploration Project [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	20.00%
Annual per acre royalty payable	$ 75
Churchrock [Member]
Property, Plant and Equipment [Line Items]
Gross area on mineral leases	3,458
Net area on mineral leases	3,458
Churchrock [Member] \| Section 17 and Mancos [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	33.00%
Percentage of overriding royalty obligation	2.00%
Churchrock [Member] \| Minimum [Member] \| Section 17 and Mancos [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	5.00%
Churchrock [Member] \| Maximum [Member] \| Section 17 and Mancos [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	6.25%
Churchrock Project [Member]
Property, Plant and Equipment [Line Items]
Mineral property expenses	109	250
Number of parcels	3
Crownpoint [Member]
Property, Plant and Equipment [Line Items]
Gross area on mineral leases	640
Net area on mineral leases	556
Annual maintenance fee per claim	$ 155
Crownpoint [Member] \| Churchrock Deposits [Member]
Property, Plant and Equipment [Line Items]
Distance of property from a specified location	22
Crownpoint [Member] \| Section 9 Northwest [Member]
Property, Plant and Equipment [Line Items]
Percentage of section the Company holds mineral rights	0.25%
Number of unpatented lode mining claims	9
Crownpoint [Member] \| Section 24 Southwest [Member]
Property, Plant and Equipment [Line Items]
Percentage of section the Company holds mineral rights	0.25%
Number of unpatented lode mining claims	10
Crownpoint [Member] \| Section 25 North East [Member]
Property, Plant and Equipment [Line Items]
Percentage of section the Company holds mineral rights	0.25%
Number of unpatented lode mining claims	8
Crownpoint [Member] \| Section 24 Southeast [Member]
Property, Plant and Equipment [Line Items]
Percentage of section the Company holds mineral rights	0.25%
Number of unpatented lode mining claims	2
Percentage of interest earned in project	40.00%
Area of land in mineral fee interest acquired	140
Percentage of mineral fee interest Company owns on additional acres	100.00%
Additional area of land in fee interest acquired	20
Cebolleta Property [Member]
Property, Plant and Equipment [Line Items]
Mineral property expenses	571	585
Cebolleta Property [Member] \| Neutron Energy Inc [Member]
Property, Plant and Equipment [Line Items]
Lease term	10 years
Area covered under lease	6,717
Initial payments per lease agreement	5,000
Amount used in the calculation of recoverable reserve payment per unit	1.00
Annual advance royalties previously paid	6,500
Royality payable	500
Cebolleta Property [Member] \| Minimum [Member] \| Neutron Energy Inc [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	4.50%
Cebolleta Property [Member] \| Maximum [Member] \| Neutron Energy Inc [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	8.00%
Feasibility study term	6 years
Annual advance royalties previously paid	1,500
Amount of deduction to recoverable reserve payment	5,000
Juan Tafoya Property [Member]
Property, Plant and Equipment [Line Items]
Mineral property expenses	413	474
Lease term	10 years
Area of land in mineral fee interest acquired	4,097
Initial payments per lease agreement	1,250
Annual base rent per acre	$ 75
Reduction of market value per pound	$ 25
Juan Tafoya Property [Member] \| First Five Year [Member]
Property, Plant and Equipment [Line Items]
Annual rental payments	225
Juan Tafoya Property [Member] \| Second Five Year [Member]
Property, Plant and Equipment [Line Items]
Annual rental payments	338
Juan Tafoya Property [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	4.65%
Juan Tafoya Property [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	6.50%
Roca Honda Project [Member]
Property, Plant and Equipment [Line Items]
Mineral property expenses	80	75
Area covered under lease	3,688
Roca Honda Project [Member] \| Section 8 [Member]
Property, Plant and Equipment [Line Items]
Number of unpatented lode mining claims	36
Roca Honda Project [Member] \| Section 11 [Member]
Property, Plant and Equipment [Line Items]
Number of unpatented lode mining claims	31
Nose Rock Project [Member]
Property, Plant and Equipment [Line Items]
Mineral property expenses
Area covered under lease	6,400
Percentage of Royalties on lease	0.00%
Interest earned in project in consideration of investment	0.00%
West Largo Project [Member]
Property, Plant and Equipment [Line Items]
Mineral property expenses	12	22
Percentage of interest earned in project	100.00%
Annual maintenance fee per claim	$ 155
Area covered under lease	3,840
West Largo Project [Member] \| Sections 20 and 28 [Member]
Property, Plant and Equipment [Line Items]
Number of unpatented lode mining claims	75
West Largo Project [Member] \| Section 29 [Member] \| Elkins Ranch [Member]
Property, Plant and Equipment [Line Items]
Percentage of royalties on lease of sales	2.50%
Gallup [Member] \| Crownpoint [Member]
Property, Plant and Equipment [Line Items]
Distance of property from a specified location	35
Gallup [Member] \| Nose Rock Project [Member]
Property, Plant and Equipment [Line Items]
Distance of property from a specified location	45
Albuquerque [Member] \| Juan Tafoya Property [Member]
Property, Plant and Equipment [Line Items]
Distance of property from a specified location	45
Laguna [Member] \| Juan Tafoya Property [Member]
Property, Plant and Equipment [Line Items]
Distance of property from a specified location	25
San Mateo [Member] \| Roca Honda Project [Member]
Property, Plant and Equipment [Line Items]
Distance of property from a specified location	4
Asset Exchange Agreement with Rio Grande Resources Corporation [Member] \| Roca Honda [Member]
Property, Plant and Equipment [Line Items]
Fair value of the assets			2,313
Gain on exchange of assets			$ 2,313
Unproved uranium assets duration period			3 years
Number of parcels			2