XML 54 R34.htm IDEA: XBRL DOCUMENT v2.4.0.6

STOCK-BASED COMPENSATION (Detail Textuals 3) (Restricted Stock, USD $)	9 Months Ended
	Sep. 30, 2012
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to non-vested restricted shares	$ 5,923,000
Unrecognized compensation cost related to non-vested restricted shares recogonized period	3.9 years

X

- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans.

+ References

No definition available.

+ Details

Name:	mpx_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognitionTwo
Namespace Prefix:	mpx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate unrecognized cost of share-based awards, other than options, made to employees under an equity-based compensation plan, that have yet to vest.

+ References

No definition available.

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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