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Intangible Assets, net
6 Months Ended
Jun. 30, 2018
Intangible Assets, net [Text Block]
10.

Intangible Assets, net

Intangible assets as of December 31, 2017 and June 30, 2018 consisted of the followings:

    December 31,     June 30,  
    2017     2018  
Computer software at cost $ 27,340   $ 26,875  
Accumulated amortization   (7,291 )   (8,510 )
  $ 20,049   $ 18,365  

Amortization expenses were $647 and $698 for the three months ended June 30, 2017 and 2018 and $1,293 and $1,397 for the six months ended June 30, 2017 and 2018, respectively.