XML 53 R42.htm IDEA: XBRL DOCUMENT v3.21.2

Significant Customer and Other Information (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021
Net Sales [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration Risk [Abstract]
Concentration risk percentage	40.00%	45.00%	37.00%	45.00%
Net Sales [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration Risk [Abstract]
Concentration risk percentage	17.00%	21.00%	18.00%	23.00%
Net Sales [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration Risk [Abstract]
Concentration risk percentage	30.00%	23.00%	30.00%	20.00%
Net Sales [Member] | Product Concentration Risk [Member]
Concentration Risk [Abstract]
Concentration risk percentage	100.00%	100.00%	100.00%	100.00%
Net Sales [Member] | Product Concentration Risk [Member] | Rotating Electrical Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	73.00%	80.00%	71.00%	77.00%
Net Sales [Member] | Product Concentration Risk [Member] | Wheel Hub Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	11.00%	12.00%	12.00%	14.00%
Net Sales [Member] | Product Concentration Risk [Member] | Brake-Related Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	14.00%	7.00%	15.00%	8.00%
Net Sales [Member] | Product Concentration Risk [Member] | Other Products [Member]
Concentration Risk [Abstract]
Concentration risk percentage	2.00%	1.00%	2.00%	1.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer A [Member]
Concentration Risk [Abstract]
Concentration risk percentage	37.00%				50.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer B [Member]
Concentration Risk [Abstract]
Concentration risk percentage	19.00%				23.00%
Accounts Receivable - Trade [Member] | Customer Concentration Risk [Member] | Customer C [Member]
Concentration Risk [Abstract]
Concentration risk percentage	10.00%				0.00%

X

- References

No definition available.

+ Details

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

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueProductLineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=mpaa_CustomerAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=mpaa_CustomerBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=mpaa_CustomerCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_ProductConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=mpaa_RotatingElectricalProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=mpaa_WheelHubProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=mpaa_BrakeRelatedProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=mpaa_OtherProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: