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Significant Concentrations (Narrative) (Details) | 12 Months Ended
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Sep. 30, 2012
Significant Concentrations 2 | 10.00%

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- Definition Significant Concentrations 2 + References No definition available. + Details
Name: | cbak_SignificantConcentrationsZeroOneZeroSevenSixOneFourSevenEightNineNRZThreeQKfSevenmRSeven
Namespace Prefix: | cbak_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration