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INTANGIBLE ASSETS, NET (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
INTANGIBLE ASSETS, NET      
Gross Carrying Amount $ 6,660,847 $ 10,117,386  
Accumulated Amortization (2,333,243) (1,601,152)  
Total intangible assets, net 4,327,604 8,516,234  
Amortization expense 754,148 1,012,624 320,146
Expected amortization expense of intangible assets      
2013 900,000    
2014 900,000    
2015 800,000    
2016 600,000    
2017 300,000    
Acquired power purchase agreements
      
INTANGIBLE ASSETS, NET      
Gross Carrying Amount   4,111,199  
Accumulated Amortization   (142,969)  
Total intangible assets, net   3,968,230  
Technical know-how
      
INTANGIBLE ASSETS, NET      
Gross Carrying Amount 1,025,861 1,023,354  
Accumulated Amortization (341,954) (213,199)  
Total intangible assets, net 683,907 810,155  
Computer software
      
INTANGIBLE ASSETS, NET      
Gross Carrying Amount 5,634,986 4,982,833  
Accumulated Amortization (1,991,289) (1,244,984)  
Total intangible assets, net $ 3,643,697 $ 2,727,849