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Intangible Assets, net
3 Months Ended
Mar. 31, 2018
Intangible Assets, net [Text Block]
10.

Intangible Assets, net

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

      December 31,     March 31,  
      2017     2018  
  Computer software at cost $ 27,340   $ 28,345  
  Accumulated amortization   (7,291 )   (8,267 )
    $ 20,049   $ 20,078  

Amortization expenses were $646 and $699 for the three months ended March 31, 2017 and 2018, respectively.