Concentrations and Credit Risk (Details 1) - USD ($)		Sep. 30, 2019	Dec. 31, 2018
Accounts receivable		$ 16,654,801	$ 21,751,032
Zhengzhou BAK Battery Co., Ltd [Member]
Accounts receivable		$ 2,113,251		[1]
Concentration risk, percentage of accounts receivable		12.69%		[1]
Customer A [Member]
Accounts receivable		$ 1,524,997	$ 1,769,416
Concentration risk, percentage of accounts receivable		12.05%	11.49%
Customer C [Member]
Accounts receivable		$ 2,206,467	$ 2,293,257
Concentration risk, percentage of accounts receivable		17.38%	14.89%
Customer E [Member]
Accounts receivable	[1]		$ 4,283,023
Concentration risk, percentage of accounts receivable	[1]		27.82%

[1] Comprised less than 10% of account receivable (net) for the respective period.