v2.4.1.9
Enterprise-wide geographic reporting (Tables)
12 Months Ended
Dec. 31, 2014
Enterprise-wide geographic reporting [Abstract]  
Summary of Enterprise-wide geographic reporting
                Year ended December 31,                  
2014   2013     2012  
           
China $ 41,321     $ 177,836     $ 143,877  
International                                1,909       23,138       22,824  
Total   $ 43,230     $ 200,974     $ 166,701