Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Oct. 01, 2011	Dec. 31, 2010
Current assets:
Allowance for doubtful accounts	$ 2,068	$ 1,111
Stockholders' equity:
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	26,596,145	26,466,216
Common stock, shares outstanding	26,596,145	26,466,216