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Note 5 - Stock-based Compensation (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Selling, General and Administrative Expenses [Member]
       
Note 5 - Stock-based Compensation (Details) [Line Items]        
Allocated Share-based Compensation Expense $ 0.4 $ 0.7 $ 1.6 $ 2.3
Options and Restricted Stock [Member]
       
Note 5 - Stock-based Compensation (Details) [Line Items]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized 3.8   3.8  
Employee Service Share-based Compensation, Nonvested Awards, 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, Fair Value     $ 3.6 $ 2.2