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Segment Information (Details)	12 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Segment Information (Details) [Line Items]
Number of operating segments	2
Recognized impairment loss
Impairment loss of property, plant and equipment
Hong Kong [Member]
Segment Information (Details) [Line Items]
Impairment loss of property, plant and equipment	$ 106
China [Member]
Segment Information (Details) [Line Items]
Impairment loss of property, plant and equipment	229
Metal Stamping and Mechanical OEM [Member]
Segment Information (Details) [Line Items]
Recognized impairment loss	190,000
Electric OEM [Member]
Segment Information (Details) [Line Items]
Recognized impairment loss	$ 145,000

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- Definition

Impairment loss of property, plant and equipment.

+ References

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- Definition

Amount of impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 340
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479483/340-40-50-3

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 49
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-49

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-18

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