Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 29, 2013	Dec. 29, 2012	Jun. 30, 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	24,387,175	23,777,030	23,371,203
Common stock, shares outstanding	24,356,285	23,746,140	23,340,313