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Prepaid Expenses (Tables)
12 Months Ended
Dec. 31, 2012
Prepaid Expenses [Abstract]  
Schedule of Prepaid and Other Current Assets
    2012     2011  
Prepaid mineral leases   $ 2,022,830     $ 1,577,544  
Other     785,793       264,935  
Total   $ 2,808,623     $ 1,842,479