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INTANGIBLE ASSETS, NET
 12 Months Ended
Dec. 31, 2012
INTANGIBLE ASSETS, NET  
INTANGIBLE ASSETS, NET

7. INTANGIBLE ASSETS, NET

        The following summarizes the Company's intangible assets:

As of December 31, 2012
  Gross
Carrying
Amount		   Accumulated
Amortization		   Net  
 
   $
   $
   $
  

Technical know-how

     1,025,861     (341,954 )   683,907  

Computer software

     5,634,986     (1,991,289 )   3,643,697  
               

Total intangible assets, net

     6,660,847     (2,333,243 )   4,327,604  
               

 

As of December 31, 2011
  Gross
Carrying
Amount		   Accumulated
Amortization		   Net  
 
   $
   $
   $
  

Acquired power purchase agreements

     4,111,199     (142,969 )   3,968,230  

Technical know-how

     1,023,354     (213,199 )   810,155  

Computer software

     4,982,833     (1,244,984 )   3,727,849  
               

Total intangible assets, net

     10,117,386     (1,601,152 )   8,516,234  
               

        Amortization expense for the years ended December 31, 2010, 2011 and 2012 were $320,146, $1,012,624 and $754,148, respectively.

        Amortization expenses of the above intangible assets is expected to be approximately $0.9 million, $0.9 million, $0.8 million, $0.6million and $0.3 million for the years ended December 31, 2013, 2014, 2015, 2016 and 2017, respectively.