Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Condensed Consolidated Statements Of Income [Abstract]
Net sales	$ 53,502	$ 48,807	$ 97,903	$ 90,753
Cost of goods sold	22,242	20,993	41,718	39,369
Gross Profit	31,260	27,814	56,185	51,384
Selling, general and administrative expenses	23,321	19,354	42,921	37,829
Service and distribution costs	2,299	2,167	4,299	4,215
Research and development expenses	842	716	1,549	1,376
Operating Income	4,798	5,577	7,416	7,964
Interest income	2	7	4	10
Interest expense	(125)	(155)	(251)	(313)
Other expense	(41)	(131)	(49)	(108)
Interest and Other Expense	(164)	(279)	(296)	(411)
Income Before Income Taxes	4,634	5,298	7,120	7,553
Income tax provision	1,544	1,637	2,390	2,354
Net Income	$ 3,090	$ 3,661	$ 4,730	$ 5,199
Net Income Per Share:
Basic	$ 0.25	$ 0.30	$ 0.38	$ 0.42
Diluted	$ 0.24	$ 0.28	$ 0.36	$ 0.40
Weighted Average Shares Outstanding:
Denominator for Basic Net Income Per Share	12,333	12,397	12,288	12,343
Effect of dilutive securities	684	580	694	583
Denominator for Diluted Net Income Per Share	13,017	12,977	12,982	12,926