XML 70 R58.htm IDEA: XBRL DOCUMENT
v3.22.0.1

COMMITMENTS AND CONTINGENCIES - Dealer Floor Plan Financing (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
COMMITMENTS AND CONTINGENCIES |  |
Repurchases of inventory | $ 0.0 | $ 0.0
Total purchase obligation | $ 6.5 |
Floor plan lender one |  |
COMMITMENTS AND CONTINGENCIES |  |
Repurchase limit in percentage of amount of average net receivables | 16.00% |
Total purchase obligation | $ 4.1 |
Additional floor plan lenders |  |
COMMITMENTS AND CONTINGENCIES |  |
Total purchase obligation | $ 2.4 |

X
- Definition 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. + References No definition available. + Details
Name: | mpx_CommitmentsAndContingenciesLineItems
Namespace Prefix: | mpx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the percentage of the average net receivables which is used to calculate the contractual repurchase limit. + References No definition available. + Details
Name: | mpx_ContractualObligationOfRepurchaseLimitInPercentageOfAmountOfAverageNetReceivables
Namespace Prefix: | mpx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of repurchases of inventory under contractual agreements. + References No definition available. + Details
Name: | mpx_RepurchaseObligationsRepurchasesOfInventoryUnderContractualAgreements
Namespace Prefix: | mpx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
Name: | us-gaap_PurchaseObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_CounterpartyNameAxis=mpx_FloorPlanLenderOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=mpx_AdditionalFloorPlanLendersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |