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Cash and cash equivalents
6 Months Ended
Jun. 30, 2016
Cash and Cash Equivalents [Abstract]  
Cash and cash equivalents

3. Cash and cash equivalents

 

     JUNE 30,
2016
     DECEMBER 31,
2015
 

Cash

   $ 7,895       $ 2,133   

Cash equivalents

     14,575         37,393   
  

 

 

    

 

 

 
   $ 22,470       $ 39,526