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Prepayments and Other Receivables | 6 Months Ended
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Mar. 31, 2014
Prepayments and Other Receivables [Text Block] | 5. Prepayments and Other Receivables
|  | Note |  |  | September 30, 2013 |  |  | March 31, 2014 |
Prepayments for raw materials and others |  |  |  | $ | 3,466,177 |  | $ | 1,637,881 |
Staff advances |  |  |  |  | 701,923 |  |  | 985,344 |
Prepaid operating expenses |  |  |  |  | 292,049 |  |  | 129,294 |
Advance to an unrelated third party |  | (a) |  |  | 1,169,798 |  |  | 3,204,102 |
Advance to a related party |  | (b) |  |  | 885,052 |  |  | 2,287,903 |
Consideration receivable |  | (c) |  |  | 6,483,507 |  |  | 6,384,215 |
Net assets of BAK Canada held by trustee |  | (d) |  |  | 1,043,833 |  |  | 1,297,937 |
Value added tax recoverable |  |  |  |  | 4,295,390 |  |  | 3,796,135 |
Rental receivable from Research and Development Test Centre |  |  |  |  | 37,239 |  |  | 338,125 |
Others |  |  |  |  | 1,371,790 |  |  | 1,610,349 |
|  |  |  |  | 19,746,758 |  |  | 21,671,285 |
Less: Allowance for doubtful accounts |  |  |  |  | (1,980,914 | ) |  | (1,939,655 | )
|  |  |  | $ | 17,765,844 |  | $ | 19,731,630 |
(a) | Advances to unrelated third parties were interest-free, unsecured and repayable on demand.
(b) | As of September 30 and March 31, 2014, the Company advanced to Tianjin BAK New Energy Research Institute Co., Ltd (Tianjin New Energy), a related party under the common control of Mr. Xiangqian Li (Mr. Li), the Company's CEO, an amount of $885,052 and $2,287,903 respectively which were interest-free, unsecured and repayable on demand.
(c) | On August 27, 2013, the Company completed the equity transfer of Tianjin Meicai to Tianjin Zhantuo International Trading Co., Ltd. (Tianjin Zhantuo), an unrelated third party. As of September 30, 2013 and March 31, 2014, the remaining consideration receivable was $6,483,507 and $6,384,215 (RMB39.7 million). The amount was interest-free, repayable on September 26, 2013 (30 days upon completion) and pledged for advance from Tianjin Zhantuo (Note 10(e)).
(d) | BAK Canada filed for bankruptcy on March 28, 2013. As of September 30, 2013 and March 31, 2014, its net assets were held under the custody of its trustee.
An analysis of the allowance for doubtful accounts is as follows:
|  | Six months ended March 31, 2014 |
Balance at beginning of the period | $ | 1,980,914 |
Provision for the period |  | 20,667 |
Recovery for the period |  | (31,805 | )
Foreign exchange adjustment |  | (30,121 | )
Balance at end of the period | $ | 1,939,655 |

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