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Prepayments and Other Receivables | 3 Months Ended
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Dec. 31, 2012
Prepayments and Other Receivables [Text Block] | 5 Prepayments and Other Receivables, net Prepayments and other receivables as of September 30, 2012 and December 31, 2012 consisted of the following:
|  | September 30, |  |  | December 31, |
|  | 2012 |  |  | 2012 |
Prepayments for raw materials and others | $ | 4,458,058 |  | $ | 4,803,446 |
Staff advance and prepayment for operating purpose |  | 4,554,817 |  |  | 4,864,847 |
|  | 9,012,875 |  |  | 9,668,293 |
Less: Allowance for doubtful accounts |  | (1,305,329 | ) |  | (1,257,595 | )
| $ | 7,707,546 |  | $ | 8,410,698 |
An analysis of the allowance for doubtful accounts for the three months ended December 31, 2011 and 2012 is as follows:
|  | Three months ended December 31, |
|  | 2011 |  |  | 2012 |
Balance at beginning of period | $ | 694,587 |  | $ | 1,305,329 |
Allowance (Reversal) for the period |  | 555,615 |  |  | (58,958 | )
Foreign exchange adjustment |  | 13,057 |  |  | 11,224 |
Balance at end of period | $ | 1,263,259 |  | $ | 1,257,595 |

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- Definition Prepayments and Other Receivables + References No definition available. + Details
Name: | cbak_PrepaymentsAndOtherReceivablesTextBlock
Namespace Prefix: | cbak_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration