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PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)
12 Months Ended
Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following:

 

   At December 31, 
   2014   2015 
         
Prepaid expenses  $497   $331 
Value added tax refundable   3,108    4,810 
Interest receivables   591    1,202 
Others   315    105 
   $4,511   $6,448