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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Restricted Cash |  |  |
Certificates of deposit and money market accounts | $ 9,491,865 | $ 9,379,794 |
Change in the balance of the restoration and reclamation liability |  |  |
Reserve for future restoration and reclamation costs at the beginning of the period | 4,735,759 | 5,043,645 |
Changes in cash flow estimates | 1,444,406 | 1,101,234 |
Costs incurred | (1,767,289) | (1,530,303) |
Accretion expense | 85,181 | 121,183 | 155,943
Reserve for future restoration and reclamation costs at the end of the period | 4,498,057 | 4,735,759 | 5,043,645
Contingent Liabilities-Off Balance Sheet Arrangements |  |  |
Amount of bank Letters of Credit and performance bonds issued | $ 8,707,000 |  |
Earnings Per Share |  |  |
Dilutive securities (in shares) | 0 | 0 | 0
Potential dilutive Common Stock excluded from the calculation of diluted earnings per share (in shares) | 403,274 | 454,885 | 594,714

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