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v3.20.1

Leases, General Information (Details) | 12 Months Ended
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Mar. 31, 2020 USD ($) ft² Building | Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($)
Leases [Abstract] |  |  |
Loss in foreign currency-denominated lease liabilities | $ (11,710,000) | $ 0 | $ 0
Maximum [Member] |  |  |
Leases [Abstract] |  |  |
Option to extend, term | 5 years |  |
Office and Manufacturing Equipment [Member] | Minimum [Member] |  |  |
Leases [Abstract] |  |  |
Finance leases term | 3 years |  |
Office and Manufacturing Equipment [Member] | Maximum [Member] |  |  |
Leases [Abstract] |  |  |
Finance leases term | 5 years |  |
Mexico [Member] |  |  |
Leases [Abstract] |  |  |
Number of buildings under lease not yet commenced | Building | 1 |  |
Lease expiration date | Dec. 31, 2032 |  |
Lease payments, lease not yet commenced | $ 12,538,000 |  |
Mexico [Member] | Remanufacturing Facility [Member] |  |  |
Leases [Abstract] |  |  |
Area of facility | ft² | 199,000 |  |
Increase in operating lease liability | $ 16,245,000 |  |
Canada [Member] |  |  |
Leases [Abstract] |  |  |
Number of buildings under lease not yet commenced | Building | 1 |  |
Lease expiration date | May 31, 2023 |  |
Lease payments, lease not yet commenced | $ 4,299,000 |  |

X
- Definition Area of facility. + References No definition available. + Details
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Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of gain (loss) on the remeasurement of lease liabilities. + References No definition available. + Details
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Balance Type: | credit
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X
- Definition The increase (decrease) during the reporting period in the aggregate amount of liabilities that result from activities related to leases. + References No definition available. + Details
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X
- Definition Term of option to extend lessee's operating and finance leases in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition Maturity date of lessee's operating lease not yet commenced. + References No definition available. + Details
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X
- Definition Amount of lessee's undiscounted obligation for lease payments for lease not yet commenced. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | instant

X
- Definition The number of buildings for a operating lease which has been executed but not yet commenced. + References No definition available. + Details
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Namespace Prefix: | mpaa_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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- Definition Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Details
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- Details
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- Details
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- Details
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