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Receivables from Former Subsidiaries (Tables) | 12 Months Ended
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Sep. 30, 2015
Schedule of Receivable From A Former Subsidiary [Table Text Block] |
|  |  | 2014 |  |  | 2015 |
| Shenzhen BAK | $ | 1,856,356 |  | $ | 62,963 |
| BAK Tianjin |  | 7,261,089 |  |  | 623,551 |
|  |  | 9,117,445 |  |  | 686,514 |
| Allowance for doubtful debts |  | (1,856,356 | ) |  | - |
| Carrying amount | $ | 7,261,089 |  | $ | 686,514 |

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- Definition Schedule of Receivable from a former subsidiary [Table Text Block] + References No definition available. + Details
Name: | cbak_ScheduleOfReceivableFromAFormerSubsidiaryTableTextBlock
Namespace Prefix: | cbak_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration