Commitments and Contingencies - Breakout of Marketing Allowances (Details) - USD ($)	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Marketing Allowances
Allowances incurred under long-term customer contracts	$ 8,736,000	$ 10,128,000	$ 18,253,000
Allowances related to a single exchange of product	133,169,000	130,918,000	154,194,000
Amortization of core premiums paid to customers	9,826,000	10,181,000	11,113,000
Total marketing allowances recorded as a reduction to revenues	$ 151,731,000	$ 151,227,000	$ 183,560,000

The marketing and other allowances the Company typically grants its customers in connection with its new or expanded customer relationships adversely impact the near-term revenues, profitability, and associated cash flows from these arrangements.

No definition available.

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