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Note 5 - Stock-based Compensation (Details Textual) - USD ($)
9 Months Ended 12 Months Ended
Oct. 02, 2016
Oct. 04, 2015
Jan. 03, 2016
Employee Stock Option [Member]      
Allocated Share-based Compensation Expense $ 0 $ 0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 0 0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 87,500    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 8.75    
Performance Shares [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year    
Performance Shares [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Performance Shares [Member]      
Allocated Share-based Compensation Expense $ 1,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 430,000   0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 441,000   0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options $ 6,500,000    
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Shares Issued During Exercise of Instrument, Upper Limit, Percentage 200.00%    
Restricted Stock [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 2 years    
Restricted Stock [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Restricted Stock [Member]      
Allocated Share-based Compensation Expense $ 2,400,000 $ 10,900,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 564,000   1,470,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 272,000 597,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options $ 5,600,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value $ 700,000