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Note 5 - Stock-based Compensation (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Jun. 29, 2013
Sep. 28, 2013
Sep. 29, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]          
Allocated Share-based Compensation Expense $ 0.7 $ 0.8   $ 2.3 $ 2.8
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized 4.0     4.0  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     1 year 219 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value       $ 2.2 $ 4.3