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Prepaid Expenses | 12 Months Ended
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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 |

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