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Prepaid Expenses
12 Months Ended
Dec. 31, 2012
Prepaid Expenses [Abstract]  
Prepaid Expenses

7. Prepaid Expenses

 

Prepaid expenses and other current assets at December 31, 2012 and 2011 consisted of the following:

 

    2012     2011  
Prepaid mineral leases   $ 2,022,830     $ 1,577,544  
Other     785,793       264,935  
Total   $ 2,808,623     $ 1,842,479