Product Warranty Provision (Details Textual)	3 Months Ended
Mar. 31, 2019
Product Warranty Provision (Textual)
Standard product warranty, description	The Company maintains a policy of providing after sales support for certain of its new EV and LEV battery products introduced since October 1, 2015 by way of a warranty program. The limited cover covers a period of six to twelve months for battery cells, a period of twelve to twenty seven months for battery modules for light electric vehicles (LEV) such as electric bicycles, and a period of three years to eight years (or 120,000 or 200,000 km if reached sooner) for battery modules for electric vehicles (EV).

Describes the nature of the product warranty, including the approximate term of the product warranty, how the product warranty arose, and the events or circumstances that would require the warrantor to perform under the product warranty.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12069-110248

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

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