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Balances with Former Subsidiaries (Tables) | 12 Months Ended
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Sep. 30, 2016
Schedule of Receivable From A Former Subsidiary [Table Text Block] |
|  |  | 2015 |  |  | 2016 |
| Shenzhen BAK | $ | 62,963 |  | $ | - |
| BAK Tianjin |  | 623,551 |  |  | - |
|  | $ | 686,514 |  | $ | - |
Schedule of Advance From A Former Subsidiary [Table Text Block] |
|  |  | 2015 |  |  | 2016 |
| BAK Tianjin | $ | - |  | $ | 56,188 |
| Shenzhen BAK |  | - |  |  | 4,326,046 |
|  |  | - |  |  | 4,382,234 |

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- Definition Schedule of Advance From A Former Subsidiary [Table Text Block] + References No definition available. + Details
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Namespace Prefix: | cbak_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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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