Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 28, 2013	Dec. 29, 2012	Sep. 29, 2012
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.001	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000,000	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0	0
Common stock, par value	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000	50,000,000
Common stock, shares issued	24,434,419	23,777,030	23,451,455
Common stock, shares outstanding	24,354,670	23,746,140	23,420,565