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Concentrations and Credit Risk (Details 4) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Sales of finished goods $ 22,194,348 $ 24,433,304
Proceeds on disposal of patented proprietary technology offset against amount due to a former subsidiary (Note 6) 12,845,795
Bak Shenzhen [Member]    
Purchase of inventories [1] 63,950 107,280
Sales of finished goods 526,719
Zhengzhou BAK Battery Co., Ltd [Member]    
Purchase of inventories [2] 2,032,756
Sales of finished goods [2] 3,961,050
BAK Tianjin [Member]    
Purchase of inventories 36,766
Sales of finished goods 31,610
Zhengzhou BAK New Energy Vehicle Co. Ltd (b) [Member]    
Purchase of inventories [1] $ 3,812,819
[1] Mr. Xiangqian Li, our former CEO, is a director of this company.
[2] Mr. Xiangqian Li, the former CEO, is a director of this company. As of December 31, 2018 and December 31, 2019, payable to Zhengzhou BAK Battery Co., Ltd were $2,291,261 and nil, respectively, was included in trade accounts and bills payable.