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Cash and cash equivalents
12 Months Ended
Dec. 31, 2016
Cash And Cash Equivalents [Abstract]  
Cash and cash equivalents

4. Cash and cash equivalents

 

 

 

As of December 31,

 

 

 

2015

 

 

2016

 

Cash and other bank balances

 

$

450,907

 

 

$

422,623

 

Total

 

$

450,907

 

 

$

422,623