Quarterly Results Of Operations (Schedule Of Quarterly Results Of Operations) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Quarterly Results Of Operations [Abstract]
Net sales	$ 46,359	$ 43,396	$ 48,807	$ 41,946	$ 43,278	$ 43,809	$ 47,768	$ 39,782	$ 180,508	$ 174,637	$ 158,312
Gross Profit	24,779	23,147	27,814	23,570	22,953	23,509	27,397	23,165	99,310	97,024	88,222
Net Income	$ 1,910	$ 2,039	$ 3,661	$ 1,538	$ 1,941	$ 1,945	$ 3,159	$ 1,265	$ 9,148	$ 8,310	$ 6,208
Net Income Per Share: Basic	$ 0.15	$ 0.16	$ 0.30	$ 0.13	$ 0.16	$ 0.16	$ 0.26	$ 0.10	$ 0.74	$ 0.68	$ 0.49
Net Income Per Share: Diluted	$ 0.14	$ 0.15	$ 0.28	$ 0.12	$ 0.15	$ 0.15	$ 0.24	$ 0.10	$ 0.70	$ 0.64	$ 0.48
Denominator for Basic Net Income Per Share	12,612	12,729	12,397	12,288	12,229	12,244	12,191	12,113	12,335	12,195	12,686
Effect of Dilutive Securities, Common stock equivalents	711	597	580	605	797	796	810	778	714	810	379
Denominator for Diluted Net Income Per Share	13,323	13,326	12,977	12,893	13,026	13,040	13,001	12,891	13,049	13,005	13,065