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(5) Share-Based Compensation Plans (Tables)
12 Months Ended
Dec. 26, 2015
Compensation and Retirement Disclosure [Abstract]  
Summary of Stock Option activity
         Weighted    Weighted      
         Average    Remaining    Aggregate 
         Exercise    Contractual    Intrinsic 
    Shares    Price    Life (years)    Value 
Outstanding at                    
beginning of year   1,327,005   $1.63           
Granted   168,500   $2.85           
Exercised   (119,200)  $1.45           
Forfeited   —      —             
Expired   (18,000)  $1.02           
Outstanding at                    
end of year   1,358,305   $1.80    5.96   $1,067,205 
Options exercisable                    
at year-end   1,003,005   $1.67    5.22   $874,105 
                     
Annualized weighted average values of significant assumptions of the options granted
    2015    2014 
Risk-free interest rate   1.44-1.60%    0.91-2.16% 
Expected life in years   6-7    9 
Expected volatility   50%   53%
Expected dividend yield   0    0 
Weighted average fair value of grants  $1.41   $1.74