Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 29, 2012	Dec. 31, 2011	Oct. 01, 2011
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	23,451,455	23,022,654	22,842,299
Common stock, shares outstanding	23,420,565	22,991,764	22,811,409