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Summary of Significant Accounting Policies - Revenue Recognition (Details) - Maximum [Member]	12 Months Ended
	Mar. 31, 2025
Summary of Significant Accounting Policies [Abstract]
Remanufactured cores nominal price (in dollars per core)	0.01
Percentage of stock adjustment returns	5.00%
Percentage of aggregate returns	20.00%

X

- Definition

Percentage of aggregate returns of units from customers.

+ References

No definition available.

+ Details

Name:	mpaa_PercentageOfAggregateReturns
Namespace Prefix:	mpaa_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of stock adjustment returns from customers.

+ References

No definition available.

+ Details

Name:	mpaa_PercentageOfStockAdjustmentReturns
Namespace Prefix:	mpaa_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Remanufactured cores, portion of the product shipped, nominal price per unit.

+ References

No definition available.

+ Details

Name:	mpaa_RemanufacturedCoresNominalPrice
Namespace Prefix:	mpaa_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent summary of significant accounting policies.

+ References

No definition available.

+ Details

Name:	mpaa_SummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix:	mpaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: