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Significant Customer and Other Information (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Net Sales [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration Risk [Abstract]
Concentration risk percentage	37.00%	39.00%	35.00%	38.00%
Net Sales [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration Risk [Abstract]
Concentration risk percentage	27.00%	26.00%	27.00%	23.00%
Net Sales [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration Risk [Abstract]
Concentration risk percentage	21.00%	20.00%	20.00%	22.00%
Net Sales [Member] | Customer Concentration Risk [Member] | Customer D [Member]
Concentration Risk [Abstract]
Concentration risk percentage	4.00%	4.00%	5.00%	4.00%
Net Sales [Member] | Product Concentration Risk [Member]
Concentration Risk [Abstract]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Net Sales [Member] | Product Concentration Risk [Member] | Rotating Electrical Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	67.00%	67.00%	66.00%	67.00%
Net Sales [Member] | Product Concentration Risk [Member] | Brake-Related Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	20.00%	20.00%	21.00%	19.00%
Net Sales [Member] | Product Concentration Risk [Member] | Wheel Hub Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	9.00%	11.00%	10.00%	11.00%
Net Sales [Member] | Product Concentration Risk [Member] | Other Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	4.00%	2.00%	3.00%	3.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration Risk [Abstract]
Concentration risk percentage			40.00%		33.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration Risk [Abstract]
Concentration risk percentage			24.00%		21.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration Risk [Abstract]
Concentration risk percentage			17.00%		18.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer D [Member]
Concentration Risk [Abstract]
Concentration risk percentage			6.00%		12.00%

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No definition available.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
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