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Receivables from Former Subsidiaries (Tables)
12 Months Ended
Sep. 30, 2015
Schedule of Receivable From A Former Subsidiary [Table Text Block]
      2014     2015  
  Shenzhen BAK $ 1,856,356   $ 62,963  
  BAK Tianjin   7,261,089     623,551  
      9,117,445     686,514  
  Allowance for doubtful debts   (1,856,356 )   -  
  Carrying amount $ 7,261,089   $ 686,514