Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements Of Operations [Abstract]
Net sales	$ 35,736	$ 35,740	$ 105,755	$ 102,924
Cost of goods sold	27,202	26,042	78,704	75,272
Gross profit	8,534	9,698	27,051	27,652
Selling, general and administrative expense	5,745	5,901	17,807	17,239
Other operating income (expense):
Assets held for sale write-down	(1,135)	(500)	(1,135)	(500)
Litigation settlement gain			7,468
Litigation expense		(158)	(227)	(2,100)
Facility consolidation costs	(175)		(1,973)
Operating income	1,479	3,139	13,377	7,813
Other non-operating income, net	127	119	385	221
Interest expense	(218)	(263)	(617)	(683)
Income before income taxes	1,388	2,995	13,145	7,351
Provision for income taxes	302	1,325	6,437	4,924
Net income	$ 1,086	$ 1,670	$ 6,708	$ 2,427
Basic and diluted income per common share	$ 0.09	$ 0.13	$ 0.54	$ 0.20
Cash dividends per share	$ 0.125	$ 0.125	$ 0.375	$ 0.375
Shares used in the calculation of basic and diluted income per share	12,386	12,375	12,381	12,373