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Non-marketable equity securities (Details)	1 Months Ended		3 Months Ended	9 Months Ended
	Apr. 21, 2021 USD ($)	Apr. 21, 2021 CNY (¥)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	May 04, 2018
Non-marketable equity securities (Details) [Line Items]
Percentage of Acquired equity interests			81.56%	81.56%		90.00%
Impairment of non-marketable securities			$ 43	$ 690,585
CBAK Power [Member]
Non-marketable equity securities (Details) [Line Items]
Cash paid	$ 1,400,000	¥ 9,000,000
Percentage of Acquired equity interests	9.74%	9.74%

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Impairment of non-marketable equity securities.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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