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Contract Assets (Details) - USD ($)	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Contract Assets [Abstract]
Long-term contract assets, write-down	$ 2,805,000	$ 5,353,000	$ 3,736,000

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- Definition

Amount of loss from reductions in long-term contract assets due to quarterly revaluation of contract assets.

+ References

No definition available.

+ Details

Name:	mpaa_LongTermContractAssetsWriteDown
Namespace Prefix:	mpaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_ContractWithCustomerAssetNetAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration