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Cash and cash equivalents
12 Months Ended
Dec. 31, 2015
Cash and Cash Equivalents [Abstract]  
Cash and cash equivalents

3. Cash and cash equivalents

 

     DECEMBER
31, 2015
     DECEMBER
31, 2014
 

Cash

   $ 2,133       $ 8,351   

Cash equivalents

     37,393         6,555   
  

 

 

    

 

 

 
   $ 39,526       $ 14,906