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Condensed Consolidated Balance Sheets (USD $) | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Current Assets: |  |
Cash and cash equivalents | $ 4,350,219 | $ 4,664,596
Prepaid and other current assets | 452,961 | 708,228
Total Current Assets | 4,803,180 | 5,372,824
Property, plant and equipment, at cost: |  |
Property, plant and equipment | 100,031,128 | 100,058,667
Less accumulated depreciation, depletion and impairment | (65,404,296) | (65,318,921)
Net property, plant and equipment | 34,626,832 | 34,739,746
Certificates of deposit, restricted | 9,497,497 | 9,491,865
Total Assets | 48,927,509 | 49,604,435
Current Liabilities: |  |
Accounts payable | 1,134,536 | 1,331,888
Accrued liabilities | 1,412,219 | 1,525,726
Note payable |  | 5,000,000
Current portion of asset retirement obligations | 1,003,049 | 1,160,378
Current portion of capital leases | 78,980 | 112,140
Total Current Liabilities | 3,628,784 | 9,130,132
Asset retirement obligations | 3,375,957 | 3,337,679
Long-term debt | 950,000 | 950,000
Long-term capital leases, less current portion | 10,972 | 17,582
Total Liabilities | 7,965,713 | 13,435,393
Shareholders' Equity: |  |
Common stock, 200,000,000 shares authorized, $.001 par value; 19,821,681 and 16,150,161 shares issued and outstanding, respectively | 19,825 | 16,154
Paid-in capital | 216,601,079 | 207,338,549
Accumulated deficit | (175,649,690) | (171,176,243)
Less: Treasury stock (3,813 shares), at cost | (9,418) | (9,418)
Total Shareholders' Equity | 40,961,796 | 36,169,042
Total Liabilities and Shareholders' Equity | 48,927,509 | 49,604,435
Commitments and contingencies (Note 11) |  |

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