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Note 4 - Stock-based Compensation (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Sep. 29, 2012
Oct. 01, 2011
Allocated Share-based Compensation Expense $ 0.8 $ 1.1 $ 2.8 $ 3.5
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized 5.2   5.2  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition     1 year 6 months  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value     $ 4.3 $ 2.0