COMMITMENTS AND CONTINGENCIES (Detail Textuals) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
Contractual obligation repurchase of inventory		$ 800,000
Recorded cost of repurchase of inventory		86,000
Repurchase limit in percentage of amount of average net receivables	15.00%
Maximum repurchase obligation	5,400,000
Aggregate repurchase obligation	$ 10,700,000

This element represents the percentage of the average net receivables which is used to calculate the contractual repurchase limit.

No definition available.

Name:	mpx_ContractualObligationOfRepurchaseLimitInPercentageOfAmountOfAverageNetReceivables
Namespace Prefix:	mpx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the amount of recorded cost of contractual obligation repurchase of inventory.

No definition available.

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

Represents the amount of contractual obligation repurchase of inventory.

No definition available.

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

Represents the threshold limit for aggregate contractual repurchases under agreements having term of less than one year.

No definition available.

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

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
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.

No definition available.