XML 29 R44.htm IDEA: XBRL DOCUMENT
v2.4.0.8

WARRANTY COSTS AND OTHER CONTINGENCIES (Details Textuals 1) (USD $) | 9 Months Ended | 3 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2014 Subsequent event
Warrant Cost And Other Contingencies [Line Items] |  |
Obligations for inventory repurchases |  | $ 1,100,000
Cost reduction to net sales | $ 60,000 |

X
- Definition Represents company recorded costs in connection as a reduction to net sales. + References No definition available. + Details
Name: | mpx_CostReductionToNetSales
Namespace Prefix: | mpx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents obligations for inventory repurchases. + References No definition available. + Details
Name: | mpx_ObligationsForInventoryRepurchases
Namespace Prefix: | mpx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | mpx_WarrantCostAndOtherContingenciesLineItems
Namespace Prefix: | mpx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration