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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Cost of uranium sales:    
Operating expenses $ 2,692,780 $ 2,564,827
Mineral property expenses 2,522,050 4,229,338
Accretion/amortization of asset retirement obligations 389,740 85,181
Depreciation and depletion 299,437 396,246
Impairment of uranium properties 4,094,612 1,737,359
Total cost of uranium sales 9,998,619 9,012,951
Loss from operations before corporate expenses (9,998,619) (9,012,951)
Corporate expenses:    
General and administrative 9,707,217 10,399,084
Depreciation 148,490 160,747
Total corporate expenses 9,855,707 10,559,831
Loss from operations (19,854,326) (19,572,782)
Other income and expense:    
Change in fair value of derivative liability (107,614)  
Interest expense (408,062) (50,880)
Interest and other income, net 76,199 262,809
Net loss $ (20,293,803) $ (19,360,853)
Basic and diluted net loss per common share (in dollars per share) $ (1.06) $ (1.58)
Basic and diluted average weighted shares outstanding (in shares) 19,191,056 12,237,349