Consolidated Balance Sheets (Parenthetical) (USD $)	Oct. 02, 2011	Jan. 02, 2011
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued and outstanding	21,209,548	22,833,165
Treasury stock, shares	7,683,449	5,973,623