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Other Long-term payables (Narrative) (Details) (USD $) | 12 Months Ended
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Sep. 30, 2012
Other Long-term Payables 2 | $ 7,500,000

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- Definition Other Long-term Payables 2 + References No definition available. + Details
Name: | cbak_OtherLongtermPayablesZeroOneZeroSevenSixOneFourSevenEightKBFiveTOneSevenbNineZeroMSx
Namespace Prefix: | cbak_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration