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Deferred Government Grants (Narrative) (Details) | 12 Months Ended
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Sep. 30, 2014 USD ($) | Sep. 30, 2014 CNY
Deferred Government Grants 1 |  | 150,000,000 cbak_DeferredGovernmentGrantsZeroTwoSixFiveZeroThreeOneThreeFiveSBwnKwzswTkr
Deferred Government Grants 2 | $ 1,018,016 cbak_DeferredGovernmentGrantsZeroTwoSixFiveZeroThreeOneThreeFiveNGLWFiveZeroqTZeroBfX |

X
- Definition Deferred Government Grants 2 + References No definition available. + Details
Name: | cbak_DeferredGovernmentGrantsZeroTwoSixFiveZeroThreeOneThreeFiveNGLWFiveZeroqTZeroBfX
Namespace Prefix: | cbak_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deferred Government Grants 1 + References No definition available. + Details
Name: | cbak_DeferredGovernmentGrantsZeroTwoSixFiveZeroThreeOneThreeFiveSBwnKwzswTkr
Namespace Prefix: | cbak_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration