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Receivables from Former Subsidiaries (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2014
Receivables From Former Subsidiaries 1	$ 1.8cbak_ReceivablesFromFormerSubsidiariesZeroTwoSixEightNineThreeOneSevenNineZeropbEightPlnQXmwZ

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Receivables From Former Subsidiaries 1

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Namespace Prefix:	cbak_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration