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VARIABLE INTEREST ENTITY (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Variable Interest Entity [Line Items]      
Property, plant and equipment $ 677,895,274 $ 636,474,691  
Prepaid land use rights 36,157,610 35,316,414  
Total Assets 816,307,804 878,476,642  
Long-term borrowings, including current portion 256,527,280    
Total Liabilities 475,430,391 426,450,415  
Revenues 86,858,401 232,169,579 252,814,827
Net income (loss) (111,928,941) 33,323,952 68,571,257
Variable Interest Entity Primary Beneficiary [Member]
      
Variable Interest Entity [Line Items]      
Cash 189,312 1,006,246  
Property, plant and equipment 162,396,825 170,199,299  
Prepaid land use rights 6,632,643 6,703,454  
Total Assets 173,450,176 193,774,946  
Long-term borrowings, including current portion 33,700,800 52,334,370  
Total Liabilities 34,678,046 52,926,950  
Revenues 10,743,336 16,852,928 16,637,925
Operating costs and expenses 14,451,810 15,262,768 16,043,237
Net income (loss) $ (3,708,474) $ 1,590,160 $ 594,688