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Property, Plant and Equipment, net (Narrative) (Details) (USD $)
 12 Months Ended
Sep. 30, 2014
Property, Plant And Equipment, Net 1 $ 1,678,489cbak_PropertyPlantAndEquipmentNetZeroTwoSixFiveZeroThreeOneThreeFiveTfzRDBFourDKpkq
Property, Plant And Equipment, Net 2 388,798cbak_PropertyPlantAndEquipmentNetZeroTwoSixFiveZeroThreeOneThreeFiveLLKFiveCEightmtDfOneTwo
Property, Plant And Equipment, Net 3 $ 62,500,000cbak_PropertyPlantAndEquipmentNetZeroTwoSixFiveZeroThreeOneThreeFiveQWPJTwoSOneRwOneFiveThree
Property, Plant And Equipment, Net 4 0cbak_PropertyPlantAndEquipmentNetZeroTwoSixFiveZeroThreeOneThreeFivecvQyFourWRSevenDZZFour