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PROPERTY, PLANT AND EQUIPMENT (Details) (USD $) | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 Uranium plant | Dec. 31, 2011 Uranium plant | Dec. 31, 2012 Permits and licenses | Dec. 31, 2011 Permits and licenses | Dec. 31, 2012 Mineral rights | Dec. 31, 2011 Mineral rights | Dec. 31, 2012 VBPP | Dec. 31, 2012 Evaluation and delineation | Dec. 31, 2011 Evaluation and delineation | Dec. 31, 2012 Vehicles/depreciable equipment | Dec. 31, 2011 Vehicles/depreciable equipment | Dec. 31, 2012 Wellfield development | Dec. 31, 2011 Wellfield development | Dec. 31, 2012 Other uranium properties | Dec. 31, 2011 Other uranium properties | Dec. 31, 2012 Other property, plant and equipment | Dec. 31, 2011 Other property, plant and equipment | Dec. 31, 2012 Kingsville Dome Property acre | Dec. 31, 2011 Kingsville Dome Property | Dec. 31, 2010 Kingsville Dome Property | Dec. 31, 2012 Kingsville Dome Property Minimum | Dec. 31, 2012 Kingsville Dome Property Maximum | Dec. 31, 2012 Rosita Property acre | Dec. 31, 2011 Rosita Property | Dec. 31, 2010 Rosita Property | Dec. 31, 2012 Rosita Property Minimum | Dec. 31, 2012 Rosita Property Maximum | Dec. 31, 2012 Vasquez Property acre | Dec. 31, 2011 Vasquez Property | Dec. 31, 2010 Vasquez Property | Dec. 31, 2012 Vasquez Property Minimum | Dec. 31, 2012 Vasquez Property Maximum | Dec. 31, 2012 Rosita South acre | Dec. 31, 2010 Los Finados Project item acre | May 31, 2011 Los Finados Project CTI item | May 31, 2011 Los Finados Project CTI Maximum | Dec. 31, 2012 Los Finados Project Tecolote Project acre | Dec. 31, 2010 Los Finados Project Year 1 item | Dec. 31, 2012 Los Finados Project Year 1 Tecolote Project item | Dec. 31, 2010 Los Finados Project Year 2 item | Dec. 31, 2012 Los Finados Project Year 2 Tecolote Project item | Dec. 31, 2010 Los Finados Project Year 3 item | Dec. 31, 2012 Los Finados Project Year 3 Tecolote Project item | Dec. 31, 2012 Churchrock item acre | Dec. 31, 2012 Churchrock Section 17 and Mancos | Dec. 31, 2012 Churchrock Section 17 and Mancos Minimum | Dec. 31, 2012 Churchrock Section 17 and Mancos Maximum | Dec. 31, 2012 Churchrock Section 8 Maximum | Dec. 31, 2012 Crownpoint Property acre | Dec. 31, 2012 Crownpoint Property Churchrock deposits mi | Dec. 31, 2012 Crownpoint Property Gallup, New Mexico mi | Mar. 31, 1997 West Largo and Roca Honda property acre | Dec. 31, 2012 West Largo property Milan mi | Dec. 31, 2012 West Largo property State Highway 509 in McKinley County, New Mexico mi | Dec. 31, 2012 West Largo property Ambrosia Lake District mi | Dec. 31, 2012 Roca Honda property item acre | Dec. 31, 2012 Roca Honda property San Mateo in McKinley County, New Mexico mi | Dec. 31, 2012 Juan Tefoya acre | Dec. 31, 2012 Juan Tefoya Albuquerque mi | Dec. 31, 2012 Juan Tefoya Laguna mi
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment Balances (net) | $ 43,714,081 | $ 18,846,027 |  | $ 10,913,000 | $ 9,139,000 | $ 3,902,000 | $ 2,714,000 | $ 3,873,000 | $ 2,711,000 | $ 20,274,000 | $ 2,460,000 | $ 2,460,000 | $ 1,435,000 | $ 1,405,000 | $ 153,000 | $ 131,000 | $ 246,000 | $ 193,000 | $ 458,000 | $ 93,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment provision | 1,737,359 | 1,460,170 | 961,278 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 919,000 | 851,000 | 590,000 |  |  | 139,000 | 126,000 | 58,000 |  |  | 679,000 | 483,000 | 313,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross area on which entity has mineral leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,434 |  |  |  |  | 3,377 |  |  |  |  | 872 |  |  |  |  | 1,795 | 53,524 |  |  |  |  |  |  |  |  |  | 3,458 |  |  |  |  | 640 |  |  |  |  |  |  |  |  |  |  |
Net area on which entity has mineral leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,227 |  |  |  |  | 3,377 |  |  |  |  | 872 |  |  |  |  | 1,479 |  |  |  | 22,700 |  |  |  |  |  |  | 3,458 |  |  |  |  | 556 |  |  |  |  |  |  |  |  |  |  |
Royalties on lease based upon a percentage of uranium sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.25% | 9.375% |  |  |  | 6.25% | 18.25% |  |  |  | 6.25% | 10.25% |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% | 6.25% | 39.25% |  |  |  |  |  |  |  |  |  |  |  |
Annual per acre royalty payable to extend leases not held by production |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 | 30 |  |  |  | 10 | 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net carrying value of the property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 565,000 |  |
Specified price per pound for uranium sales on which royalty is payable at specified percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 80.00 |  |  |  |  |  |  |  | 40.00 | 25.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee paid at signing as per lease option agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of phases in exploration program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extension of exploration lease term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration obligation, number of exploration wells |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100 | 100 | 200 | 150 | 200 | 200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exploration obligation, amount of investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000 | $ 1,000,000 | $ 1,500,000 | $ 1,500,000 | $ 2,000,000 | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest earned in project in consideration of investment (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 70.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of parcels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of parcels which lie within the area generally recognized as constituting the Navajo Reservation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Overriding royalty obligation (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distance of property from a specified location |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22 | 35 |  | 21 | 1.5 | 3 |  | 4 |  | 45 | 25
Area of land in which fee interest acquired by entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 177,000 |  |  |  |  |  | 4,097 |  |
Number of unpatented mining claims owned by entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36 |  |  |  |
Area of land encompassing unpatented mining claims of entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 640 |  |  |  |

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- Definition Amount, net of accumulated depreciation, depletion and amortization, of long-lived 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, furniture and fixtures, and computer equipment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 12 -Paragraph 5 -Subparagraph b, c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 + Details
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