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Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2012
Jan. 01, 2012
Condensed Consolidated Balance Sheets [Abstract]    
Allowance for doubtful accounts receivable, current $ 113 $ 142
Accumulated amortization on other assets $ 573 $ 383
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 23,603,104 23,483,815
Common stock, shares outstanding 21,601,268 21,890,970
Treasury stock, shares 2,001,836 1,592,845