Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 29, 2012	Dec. 31, 2011
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	17,651,780	17,381,110
Common stock, shares outstanding	16,971,545	16,700,875
Treasury stock, shares	680,235	680,235