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

3. Cash and cash equivalents

 

     DECEMBER 31,
2016
     DECEMBER 31,
2015
 

Cash

   $ 3,726      $ 2,133  

Cash equivalents

     28,575        37,393  
  

 

 

    

 

 

 
   $ 32,301      $ 39,526