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Intangible Assets, net
9 Months Ended
Sep. 30, 2018
Intangible Assets, net [Text Block]
10.

Intangible Assets, net

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

    December 31,     September 30,  
    2017     2018  
Computer software at cost $ 27,340   $ 31,298  
Accumulated amortization   (7,291 )   (9,299 )
  $ 20,049   $ 21,999  

Amortization expenses were $666 and $1,118 for the three months ended September 30, 2017 and 2018 and $1,959 and $2,515 for the nine months ended September 30, 2017 and 2018, respectively.