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Contract Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Contract Assets [Abstract]
Long-term contract assets, write-down	$ 758,000	$ 1,607,000	$ 2,316,000	$ 4,380,000

X

- 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