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Intangible Assets, net
 6 Months Ended
Jun. 30, 2017
Intangible Assets, net [Text Block]
10.

Intangible Assets, net

Intangible assets as of December 31, 2016 and June 30, 2017 consisted of the followings:

      December 31,     June 30,  
      2016     2017  
  Computer software at cost $ 25,613   $ 26,233  
  Accumulated amortization   (4,269 )   (5,684 )
    $ 21,344   $ 20,549  

Amortization expenses were $680 and $647 for the three months ended June 30, 2016 and 2017 and $1,359 and $1,293 for the six months ended June 30, 2016 and 2017, respectively.