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Intangible Assets, net (Tables)
3 Months Ended
Mar. 31, 2018
SCHEDULE OF INTANGIBLE ASSETS [Table Text Block]
      December 31,     March 31,  
      2017     2018  
  Computer software at cost $ 27,340   $ 28,345  
  Accumulated amortization   (7,291 )   (8,267 )
    $ 20,049   $ 20,078