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WARRANTY COSTS AND OTHER CONTINGENCIES (Details Textuals) (USD $) In Millions, unless otherwise specified | 6 Months Ended
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Jun. 30, 2014
WARRANTY COSTS AND OTHER CONTINGENCIES |
Period of warranty provided by company to entire boat | 1 year
Term of warranty for cockpit upholstery | 2 years
Period of warranty provided by company to structural deck | 5 years
Contractual repurchase limit (% of average net receivable) - one lender | 16.00%
Maximum repurchase obligation - one lender | $ 7.8
Maximum repurchase obligation - additional lenders | 5.4
Aggregate repurchase obligation | $ 13.2

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: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Describe the approximate term of the warranty for cockpit upholstery provided by the company. + References No definition available. + Details
Name: | mpx_TermOfWarrantyForCockpitUpholstery
Namespace Prefix: | mpx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Describe the approximate term of the warranty for material and workmanship provided by the company. + References No definition available. + Details
Name: | mpx_TermOfWarrantyForMaterialsAndWorkmanship
Namespace Prefix: | mpx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Describe the approximate term of the warranty provided by the company. + References No definition available. + Details
Name: | mpx_TermOfWarrantyOnProduct
Namespace Prefix: | mpx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents threshold limit for contractual repurchases under agreements during prior12 month period. + References No definition available. + Details
Name: | mpx_ThresholdLimitForContractualRepurchasesUnderAgreementsDuringPrior12MonthPeriod
Namespace Prefix: | mpx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the threshold limit for aggregate contractual repurchases under agreements having term of less than one year. + References No definition available. + Details
Name: | mpx_ThresholdLimitForContractualRepurchasesUnderAgreementsHavingTermOfLessThanOneYear
Namespace Prefix: | mpx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ProductWarrantiesDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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