Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Stock Options, Stock Grants and New Stock (Summary of Stock Option Activity) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jan. 03, 2015
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) $ 12.77 $ 12.79 $ 12.25  
Exercises, weighted average exercise price (dollars per share) 11.55 0.00 12.47  
Canceled / Expired, weighted average exercise price (dollars per share) 15.26 16.01 14.08  
Outstanding, end of year, weighted average exercise price (dollars per share) 12.96 $ 12.77 $ 12.79 $ 12.25
Exercisable, weighted average exercise price (dollars per share) $ 12.45      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Outstanding, beginning of year (shares) 173,048 173,985 157,295  
Exercised (shares) (25,632) 0 (666)  
Canceled / Expired (shares) (1,905) (937) (15,176)  
Outstanding, end of year (shares) 145,511 173,048 173,985 157,295
Exercisable (shares) 119,861      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 78,818 $ 0 $ 1,511  
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) $ 14.72 $ 13.76    
Vested, weighted average exercise price (dollars per share) 14.35 12.71    
Forfeited unvested options (dollars per share) 15.38 16.01    
Expected to vest, end of the year, weighted average exercise price (dollars per share) $ 14.72 $ 14.72 $ 13.76  
Expected to vest (shares) 43,286 85,960    
Vested (shares) (17,574) (41,737)    
Vested, grant date fair value (dollars per share) $ 5.96 $ 6.91    
Forfeited unvested options (shares) (62) (937)    
Expected to vest (shares) 25,650 43,286 85,960  
Options outstanding, weighted average contractual term (years) 4 years 7 months 5 years 5 months 6 years 5 months 6 years 11 months
Options exercisable, weighted average contractual term (years) 4 years 2 months      
Options expected to vest, weighted average contractual term (years) 6 years 6 months 7 years 1 month 7 years 3 months  
Options outstanding, intrinsic value $ 156,445 $ 0 $ 0 $ 852,810
Share-based Compensation Arrangement by Share-based Payment Award, Options, Authorized 154,870 152,965 152,028 169,384
Options exercisable, intrinsic value $ 156,445      
Options granted, weighted average fair value (dollars per share) $ 6.41 $ 6.24 $ 6.57  
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)     $ 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)