Note 15 - Incentive and Stock Option Plans (Tables)
 12 Months Ended
Dec. 28, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
   

2014

 
                 
   

Shares

   

Weighted-Average

Grant-Date Fair Value Per Share

 
                 

Non-vested shares at beginning of year

    625,945     $ 7.04  

Granted

    275,794       12.46  

Vested

    (332,464 )     5.72  

Non-vested shares at end of year

    569,275     $ 10.46  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   

2014

 
   

Shares

   

Weighted-Average Exercise Price

   

Weighted-Average Remaining Contractual Term

   

Aggregate Intrinsic Value ($000's)

 
                                 

Outstanding at beginning of year

    1,344,079     $ 8.09                  

Granted

    -       -                  

Exercised

    (872,158 )     5.36                  

Forfeited

    (32,041 )     13.17                  

Outstanding at end of year

    439,880     $ 13.12       2.44     $ 1,757,215  

Options exercisable at year end

    439,880     $ 13.12       2.44     $ 1,757,215