Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Stockholders' Equity, Total [Member]
Balance, shares at Dec. 29, 2012		23,746,140
Balance at Dec. 29, 2012		$ 24,000	$ (385,000)	$ 193,388,000	$ 83,070,000	$ (791,000)	$ 275,306,000
Stockholders' Equity
Net Income	$ 7,837,000				7,837,000		7,837,000
Foreign currency translation adjustment, net of tax	$ 226,000					226,000	226,000
Common stock issued under equity compensation plan, shares		765,809
Common stock issued under equity compensation plan, value				7,646,000			7,647,000
Tax benefit (deficiency) from equity issuance, including excess tax benefit				807,000			807,000
Treasury Stock, Shares, Acquired		(298,094)
Treasury Stock, Value, Acquired, Cost Method			(4,020,000)				(4,020,000)
Sale of common stock pursuant to associates stock buying plan, shares	82,643	82,642
Sale of common stock pursuant to associates stock buying plan, value				781,000			781,000
Balance, shares at Dec. 28, 2013		24,296,497
Balance at Dec. 28, 2013		$ 25,000	(4,405,000)	202,622,000	90,907,000	(565,000)	288,584,000
Stockholders' Equity
Common Stock, Value, Issued		$ 1,000
Net Income	$ 1,948,000				1,948,000		1,948,000
Foreign currency translation adjustment, net of tax	$ 1,000					1,000	1,000
Common stock issued under equity compensation plan, shares		391,950
Common stock issued under equity compensation plan, value				4,760,000			4,760,000
Tax benefit (deficiency) from equity issuance, including excess tax benefit				(173,000)			(173,000)
Treasury Stock, Shares, Acquired		(359,905)
Treasury Stock, Value, Acquired, Cost Method			(4,766,000)				(4,766,000)
Sale of common stock pursuant to associates stock buying plan, shares	75,119	75,119
Sale of common stock pursuant to associates stock buying plan, value				654,000			654,000
Balance, shares at Jan. 03, 2015	24,403,661	24,403,661
Balance at Jan. 03, 2015	$ 291,008,000	$ 25,000	(9,171,000)	207,863,000	92,855,000	(564,000)	291,008,000
Stockholders' Equity
Common Stock, Value, Issued	25,000	$ 0
Net Income	4,520,000				4,520,000		4,520,000
Foreign currency translation adjustment, net of tax	$ 245,000					245,000	245,000
Common stock issued under equity compensation plan, shares		259,155
Common stock issued under equity compensation plan, value				3,928,000			3,928,000
Tax benefit (deficiency) from equity issuance, including excess tax benefit				(718,000)			(718,000)
Treasury Stock, Shares, Acquired		0
Treasury Stock, Value, Acquired, Cost Method			(114,000)				(114,000)
Sale of common stock pursuant to associates stock buying plan, shares	69,980	69,980
Sale of common stock pursuant to associates stock buying plan, value				590,000			590,000
Balance, shares at Jan. 02, 2016	24,732,796	24,732,796
Balance at Jan. 02, 2016	$ 299,459,000	$ 25,000	$ (9,285,000)	$ 211,663,000	$ 97,375,000	$ (319,000)	$ 299,459,000
Stockholders' Equity
Common Stock, Value, Issued	$ 25,000	$ 0