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Payables to former subsidiaries (Tables) | 12 Months Ended
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Dec. 31, 2017
Schedule of Trade Payable To a Former Subsidiary [Table Text Block] |
|  | September 30, |  |  | December 31, |  |  | December 31, |
|  | 2016 |  |  | 2016 |  |  | 2017 |
BAK Tianjin | $ | 56,188 |  | $ | 194,744 |  | $ | 282,682 |
BAK Shenzhen |  | 4,326,046 |  |  | 2,294,085 |  |  | 22,020,039 |
| $ | 4,382,234 |  | $ | 2,488,859 |  | $ | 22,302,721 |

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- Definition Schedule of Trade Payable To a Former Subsidiary + References No definition available. + Details
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Namespace Prefix: | cbak_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration