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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier individually.

No definition available.

Name:	mpx_PurchaseObligationMergerAgreementIndividually
Namespace Prefix:	mpx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of repurchases of inventory under contractual agreements.

No definition available.

Name:	mpx_RepurchaseObligationsRepurchasesOfInventoryUnderContractualAgreements
Namespace Prefix:	mpx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of pre tax short-term cash incentive compensation incurred during the reporting period.

No definition available.

Name:	mpx_ShortTermCashIncentiveCompensationBeforeTax
Namespace Prefix:	mpx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Percentage of pre-tax profit incentive subject to discretionary determination.

No definition available.

Name:	mpx_ShortTermCashIncentiveCompensationPreTaxProfitIncentivePercentageSubjectToDiscretionaryDetermination
Namespace Prefix:	mpx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

Name:	us-gaap_PurchaseObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Name:	srt_CounterpartyNameAxis=mpx_FloorPlanLenderOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_CounterpartyNameAxis=mpx_FloorPlanLenderTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_StatementScenarioAxis=mpx_ObligationThroughJuly2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_StatementScenarioAxis=mpx_ObligationThroughJune302026Member
Namespace Prefix:
Data Type:	na
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Name:	srt_CounterpartyNameAxis=mpx_AdditionalFloorPlanLendersMember
Namespace Prefix:
Data Type:	na
Balance Type:
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