CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 8,240	$ 7,986
Marketable securities	10,004	7,825
Accounts receivable, net	6,215	1,256
Inventories	31,657	32,638
Income taxes receivable	927	820
Prepaid expenses and other current assets	1,349	2,119
Total current assets	58,392	52,644
Property, plant and equipment, net accumulated depreciation of $24,948 in 2016 and $25,163 in 2015	12,754	12,761
Goodwill	3,308	3,308
Other intangibles, net	465	465
Marketable securities	30,873	27,129
Deferred income taxes	3,323	4,338
Other assets	10,456	10,032
Total assets	119,571	110,677
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	10,419	3,681
Accrued expenses and other liabilities	11,430	10,117
Total current liabilities	21,849	13,798
Pension liabilities	5,179	6,590
Other long-term liabilities	72	77
Total liabilities	27,100	20,465
Common stock	3,837	3,811
Capital in excess of par value	4,428	3,879
Retained earnings	86,043	84,423
Accumulated other comprehensive loss	(1,837)	(1,901)
Total stockholders' equity	92,471	90,212
Total liabilities and stockholders' equity	$ 119,571	$ 110,677

Accrued expenses and other current liabilities

No definition available.

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

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).