v2.4.1.9
PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)
12 Months Ended
Dec. 31, 2014
PREPAID EXPENSES AND OTHER CURRENT ASSETS [Abstract]  
Schedule of Prepaid Expenses and Other Current Assets
    At December 31,  
    2013     2014  
             
Prepaid expenses   $ 1,135     $ 497  
Value added tax refundable     2,213       3,108  
Interest receivables     462       591  
Others     162       315  
    $ 3,972     $ 4,511