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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 29, 2013
Dec. 28, 2012
Current assets:    
Allowance for doubtful accounts $ 2,100,000 $ 2,400,000
Stockholders' equity:    
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 100,000,000 100,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 23,921,507 23,731,570
Common stock, shares outstanding 23,899,502 23,711,838
Treasury stock, shares 22,005 19,732