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Commitments and Contingencies
 12 Months Ended
Dec. 31, 2012
Commitments and Contingencies

15. Commitments and Contingencies

(a) Operating Leases

The Group leases its facilities under non-cancelable operating leases expiring at various dates.

Future minimum lease payments under non-cancelable operating lease agreements as of December 31, 2012 were as follows:

 

Year Ended December 31

    $  

2013

      4,790,216   

2014

      3,003,773   

2015

      1,389,641   

2016 and after

      7,746,714   
  

 

 

  

Total

      16,930,344   
  

 

 

  

Rental expenses were $2,005,194, $3,681,838 and $5,175,287 during the years ended December 31, 2010, 2011 and 2012, respectively.