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CONSOLIDATED BALANCE SHEETS (USD $)
Dec. 31, 2012
Dec. 31, 2011
Current Assets:    
Cash and cash equivalents $ 4,664,596 $ 2,890,263
Prepaid and other current assets 708,228 288,845
Total Current Assets 5,372,824 3,179,108
Property, plant and equipment, at cost:    
Property, plant and equipment 100,058,667 78,399,466
Less accumulated depreciation, depletion and impairment (65,318,921) (64,791,294)
Net property, plant and equipment 34,739,746 13,608,172
Certificates of deposit, restricted 9,491,865 9,379,794
Total Assets 49,604,435 26,167,074
Current Liabilities:    
Accounts payable 1,331,888 1,148,812
Accrued liabilities 1,525,726 1,039,833
Note payable 5,000,000  
Current portion of asset retirement obligations 1,160,378 1,227,125
Current portion of capital leases 112,140 65,161
Total Current Liabilities 9,130,132 3,480,931
Other long-term liabilities and deferred credits 3,837,679 4,008,634
Long-term debt 450,000 450,000
Long-term capital leases, less current portion 17,582 54,071
Total Liabilities 13,435,393 7,993,636
Commitments and contingencies (Notes 3, 4, 7 and 13)      
Shareholders' Equity:    
Common stock, 200,000,000 shares authorized, $.001 par value; 16,150,163 and 9,400,501shares issued and outstanding, respectively 16,154 9,404
Paid-in capital 207,338,549 169,988,842
Accumulated deficit (171,176,243) (151,815,390)
Less: Treasury stock (3,813 shares), at cost (9,418) (9,418)
Total Shareholders' Equity 36,169,042 18,173,438
Total Liabilities and Shareholders' Equity $ 49,604,435 $ 26,167,074