Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Condensed Consolidated Statements of Operations [Abstract]
Net sales	$ 37,598	$ 35,241	$ 73,129	$ 70,018
Cost of goods sold	27,573	25,406	53,630	51,502
Gross profit	10,025	9,835	19,499	18,516
Selling, general and administrative expense	6,096	5,902	12,661	12,061
Other operating income (expense):
Litigation settlement gain				7,468
Litigation expense				(227)
Facility consolidation costs		(795)		(1,798)
Operating income	3,929	3,138	6,838	11,898
Other non-operating income, net	6	128	9	257
Interest expense	(141)	(187)	(302)	(399)
Income before income taxes	3,794	3,079	6,545	11,756
Provision for income taxes	1,701	1,448	2,929	6,135
Net income	$ 2,093	$ 1,631	$ 3,616	$ 5,621
Basic and diluted income per common share	$ 0.17	$ 0.13	$ 0.29	$ 0.45
Cash dividends per share	$ 0.125	$ 0.125	$ 0.25	$ 0.25
Shares used in the calculation of basic and diluted Income per share	12,388	12,381	12,387	12,378