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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2011
Jan. 01, 2011
Consolidated Balance Sheets [Abstract]    
Accounts receivable, allowance for doubtful accounts $ 47 $ 67
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 90,000 90,000
Common stock, shares issued 26,390 25,284
Common stock, shares outstanding 26,390 25,284
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 10,000 10,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0