Annual report pursuant to Section 13 and 15(d)

Stock Options, Stock Grants and New Stock (Summary of Stock Option Activity) (Details)

v3.3.1.900
Stock Options, Stock Grants and New Stock (Summary of Stock Option Activity) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]        
Outstanding, beginning of year, weighted average exercise price (dollars per share) $ 12.25 $ 11.95 $ 11.82  
Exercises, weighted average exercise price (dollars per share) 12.47 11.23 10.69  
Canceled / Expired, weighted average exercise price (dollars per share) 14.08 13.70 12.70  
Outstanding, end of year, weighted average exercise price (dollars per share) 12.79 $ 12.25 $ 11.95 $ 11.82
Exercisable, weighted average exercise price (dollars per share) $ 11.85      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Outstanding, beginning of year (shares) 157,295 162,736 220,740  
Exercised (shares) (666) (17,074) (15,247)  
Canceled / Expired (shares) (15,176) (2,157) (83,351)  
Outstanding, end of year (shares) 173,985 157,295 162,736 220,740
Exercisable (shares) 88,025      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 1,511 $ 91,772 $ 64,263  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Roll Forward]        
Expected to vest, beginning of the year, weighted average exercise price (dollars per share) $ 12.54 $ 12.18    
Vested, weighted average exercise price (dollars per share) 12.16 11.98    
Forfeited unvested options (dollars per share) 14.23 13.70    
Expected to vest, end of the year, weighted average exercise price (dollars per share) $ 8.26 $ 12.54 $ 12.18  
Expected to vest (shares) 100,508 122,145    
Vested (shares) (35,794) (33,702)    
Vested, grant date fair value (dollars per share) $ 7.01 $ 7.03    
Forfeited unvested options (shares) (11,286) (1,725)    
Expected to vest (shares) 85,960 100,508 122,145  
Options outstanding, weighted average contractual term (years) 6 years 5 months 6 years 11 months 7 years 6 months 8 years 5 months
Options exercisable, weighted average contractual term (years) 5 years 6 months      
Options expected to vest, weighted average contractual term (years) 7 years 3 months 7 years 2 months 7 years 9 months  
Options outstanding, intrinsic value $ 0 $ 852,810 $ 582,894 $ 367,937
Share-based Compensation Arrangement by Share-based Payment Award, Options, Authorized 152,028 169,384 181,017 138,260
Options exercisable, intrinsic value $ 0      
Options granted, weighted average fair value (dollars per share) $ 6.57 $ 6.76 $ 7.19  
February 7, 2013 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]        
Granted, weighted average exercise price (dollars per share)     $ 13.70  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Granted (shares)     (40,594)  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Roll Forward]        
Granted, weighted average exercise price (dollars per share)     $ 13.70  
Granted (shares)     (40,594)  
February 20, 2014 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]        
Granted, weighted average exercise price (dollars per share)   $ 14.76    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Granted (shares)   (13,790)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Roll Forward]        
Granted, weighted average exercise price (dollars per share)   $ 14.76    
Granted (shares)   (13,790)    
Options granted, weighted average fair value (dollars per share)   $ 6.70    
February 10, 2015 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]        
Granted, weighted average exercise price (dollars per share) $ 16.01      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Granted (shares) (32,532)      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Roll Forward]        
Granted, weighted average exercise price (dollars per share) $ 16.01      
Granted (shares) (32,532)      
Options granted, weighted average fair value (dollars per share) $ 6.39