Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Condensed Consolidated Statements Of Income [Abstract]
Net sales	$ 41,946	$ 39,782
Cost of goods sold	18,376	16,617
Gross Profit	23,570	23,165
Selling, general and administrative expenses	18,475	18,952
Service and distribution costs	2,048	1,579
Research and development expenses	660	571
Operating Income	2,387	2,063
Interest income	3	3
Interest expense	(158)	(227)
Other income	23	34
Interest and Other Expense	(132)	(190)
Income Before Income Taxes	2,255	1,873
Income tax provision	717	608
Net Income	$ 1,538	$ 1,265
Net Income Per Share:
Basic	$ 0.13	$ 0.10
Diluted	$ 0.12	$ 0.10
Weighted Average Shares Outstanding:
Denominator for Basic Net Income Per Share	12,288	12,113
Effect of dilutive securities	605	778
Denominator for Diluted Net Income Per Share	12,893	12,891