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Balances with Former Subsidiaries (Tables)
 12 Months Ended
Sep. 30, 2016
Schedule of Receivable From A Former Subsidiary [Table Text Block]
      2015     2016  
  Shenzhen BAK $ 62,963   $   -  
  BAK Tianjin   623,551     -  
    $ 686,514   $   -  
Schedule of Advance From A Former Subsidiary [Table Text Block]
      2015     2016  
  BAK Tianjin $   -   $ 56,188  
  Shenzhen BAK   -     4,326,046  
      -     4,382,234