Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 30, 2011	Dec. 31, 2010
Accounts receivable, allowance for doubtful account	$ 2,339	$ 2,126
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares outstanding
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	16,427	16,427
Treasury stock, shares	3,127	2,431