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Concentrations and Credit Risk (Tables) | 12 Months Ended
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Dec. 31, 2018
Concentrations and Credit Risk Tables [Abstract] |
Schedule of revenue by major customers by reporting segments |
|  | Year ended |  |  | Year ended |
|  | December 31, 2017 |  |  | December 31, 2018 |
Customer A |  | $ | 12,869,446 |  |  | 22.05 | % |  | $ | * |  |  | * |
Customer B |  |  | 29,837,878 |  |  |  | 51.11 | % |  |  | * |  |  |  | * |
Customer C |  |  | * |  |  |  | * |  |  |  | 6,330,608 |  |  |  | 25.91 | %
Customer D |  |  | * |  |  |  | * |  |  |  | 3,807,854 |  |  |  | 15.58 | %
* | Comprised less than 10% of net revenue for the respective period.
Schedule of accounts receivable by major customer |
|  | December 31, 2017 |  |  | December 31, 2018 |
Customer A |  | $ | * |  |  |  | * |  |  | $ | * |  |  |  | * |
Customer B |  |  | 23,835,201 |  |  |  | 62.08 | % |  |  | * |  |  |  | * |
Customer C |  |  | * |  |  |  | * |  |  |  | 1,769,416 |  |  |  | 11.49 | %
Customer D |  |  | * |  |  |  | * |  |  |  | 4,283,023 |  |  |  | 27.82 | %
Customer E |  |  | 4,855,518 |  |  |  | 12.65 | % |  |  | * |  |  |  | * |
Customer F |  |  | 4,664,285 |  |  |  | 12.15 | % |  |  | * |  |  |  | * |
Customer G |  |  | * |  |  |  | * |  |  |  | 2,293,257 |  |  |  | 14.89 | %
Schedule of transactions with the former subsidiaries |
|  | December 31, 2017 |  |  | December 31, 2018 |
Purchase of inventories from |  |  |  |  |  |
BAK Tianjin |  | $ | 126,567 |  |  | $ | 716,997 |
BAK Shenzhen** |  |  | 27,903,206 |  |  |  | 107,280 |
Zhengzhou BAK Battery Co., Ltd* |  |  | - |  |  |  | 2,032,756 |
Sales of finished goods to |  |  |  |  |  |  |  |
BAK Tianjin |  |  | 141,117 |  |  |  | 36,766 |
BAK Shenzhen |  |  | 61,961 |  |  |  | - |
Zhengzhou BAK Battery Co., Ltd* |  |  | 29,867 |  |  |  | - |
Proceeds on disposal of patented proprietary technology offset against amount due to BAK Shenzhen (Note 7)** |  |  | - |  |  |  | 12,845,795 |
* | Mr. Xiangqian Li, the former CEO, is a director of this company. As of December 31, 2018 and December 31, 2017, payable to Zhengzhou BAK Battery Co., Ltd were $2,291,621 and nil, respectively, was included in trade accounts and bills payable.
** | Mr. Xiangqian Li, our former CEO, is a director of this company.

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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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