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. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Jan. 01, 2011	Oct. 02, 2010	Jul. 03, 2010	Apr. 03, 2010	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Quarterly Results Of Operations [Line Items]
Net sales	$ 43,278	$ 43,809	$ 47,768	$ 39,782	$ 44,035	$ 38,156	$ 41,748	$ 34,373	$ 174,637	$ 158,312	$ 141,764
Gross Profit	22,953	23,509	27,397	23,165	24,169	20,705	23,867	19,481	97,024	88,222	76,263
Net Income	1,941	1,945	3,159	1,265	1,767	1,603	2,689	149	8,310	6,208	1,559
Net Income Per Share: Basic	$ 0.16	$ 0.16	$ 0.26	$ 0.10	$ 0.15	$ 0.13	$ 0.20	$ 0.01	$ 0.68	$ 0.49	$ 0.11
Net Income Per Share: Diluted	$ 0.15	$ 0.15	$ 0.24	$ 0.10	$ 0.14	$ 0.13	$ 0.20	$ 0.01	$ 0.64	$ 0.48	$ 0.11
Denominator for Basic Net Income Per Share	12,229	12,244	12,191	12,113	11,957	12,124	13,339	13,269	12,195	12,686	14,772
Effect of Dilutive Securities, Common stock equivalents	797	796	810	778	645	400	119	86	810	379	10
Denominator for Diluted Net Income Per Share	13,026	13,040	13,001	12,891	12,602	12,524	13,458	13,355	13,005	13,065	14,782
Originally Reported [Member]
Quarterly Results Of Operations [Line Items]
Gross Profit	22,953	23,471	27,386	23,155	24,306	20,746	23,905	19,519		88,476	76,718
Net Income	1,941	1,920	3,152	1,258	1,855	1,630	2,714	174		6,373	1,855
Net Income Per Share: Basic	$ 0.16	$ 0.16	$ 0.26	$ 0.10	$ 0.16	$ 0.13	$ 0.20	$ 0.01		$ 0.50	$ 0.13
Net Income Per Share: Diluted	$ 0.15	$ 0.15	$ 0.24	$ 0.10	$ 0.15	$ 0.13	$ 0.20	$ 0.01		$ 0.49	$ 0.13
Adjusted [Member]
Quarterly Results Of Operations [Line Items]
Gross Profit		38	11	10	(137)	(41)	(38)	(38)		88,222	76,263
Net Income		$ 25	$ 7	$ 7	$ (88)	$ (27)	$ (25)	$ (25)		$ 6,208	$ 1,559
Net Income Per Share: Basic	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ (0.01)	$ 0.00	$ 0.00	$ 0.00		$ 0.49	$ 0.11
Net Income Per Share: Diluted	$ 0.00	$ 0.00	$ 0.00	$ 0.00	$ (0.01)	$ 0.00	$ 0.00	$ 0.00		$ 0.48	$ 0.11