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Fair Value Measurement (Tables)
 12 Months Ended
Dec. 31, 2016
Assets Measured at Fair Value on Recurring Basis

The following table presents our assets measured at fair value on a recurring basis as of December 31, 2015 and 2016:

December 31, 2015

 

     Level 1      Level 2      Level 3      Total  
     US$      US$      US$      US$  

Assets

            

Short-term investments — trading securities

      681        —          —          681  

December 31, 2016

 

     Level 1      Level 2      Level 3      Total  
     US$      US$      US$      US$  

Assets

            

Short-term investments — trading securities

      695        2,607        —          3,302