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Significant Customer and Other Information (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Mar. 31, 2024
Net Sales [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration Risk [Abstract]
Concentration risk percentage	34.00%	37.00%	37.00%	35.00%
Net Sales [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration Risk [Abstract]
Concentration risk percentage	31.00%	27.00%	29.00%	27.00%
Net Sales [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration Risk [Abstract]
Concentration risk percentage	21.00%	21.00%	20.00%	20.00%
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	68.00%	67.00%	67.00%	66.00%
Net Sales [Member] | Product Concentration Risk [Member] | Brake-Related Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	21.00%	20.00%	22.00%	21.00%
Net Sales [Member] | Product Concentration Risk [Member] | Wheel Hub Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	7.00%	9.00%	7.00%	10.00%
Net Sales [Member] | Product Concentration Risk [Member] | Other Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	4.00%	4.00%	4.00%	3.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration Risk [Abstract]
Concentration risk percentage			31.00%		35.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration Risk [Abstract]
Concentration risk percentage			21.00%		13.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration Risk [Abstract]
Concentration risk percentage			19.00%		25.00%

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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
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