XML 104 R89.htm IDEA: XBRL DOCUMENT v3.19.1
Stock Based Compensation - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options granted     0 0    
Common stock market value per share $ 0.20 $ 0.20 $ 0.20 $ 0.20    
Restricted stock non-vested shares 12,000   12,000      
Unrecognized stock-based compensation expense $ 55,125   $ 55,125      
Total intrinsic value of options exercised     $ 24,300 $ 18,825    
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock restriction period     1 year 1 year    
Restricted stock grants     7,500 7,500    
Common stock market value per share $ 22.05 $ 24.03 $ 22.05 $ 24.03    
Restricted stock grant date fair value $ 165,375 $ 180,225 $ 165,375 $ 180,225    
Restricted stock cost 13,781 15,019 170,325 210,735    
Restricted stock, deferred taxes $ 3,439 $ 3,748 $ 42,496 43,395    
Restricted Stock [Member] | Chief Executive Officer [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock restriction period           5 years
Restricted stock grants           7,500
Restricted stock cost       $ 36,810 $ 31,725  
Restricted stock vesting percentage       20.00% 20.00%  
Number of restricted Shares Vested       1,500 1,500  
Employee Stock Option Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options granted, expiration period     10 years      
Directors Stock Option Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock restriction period     6 months      
Stock options granted, expiration period     10 years      
Intrinsic value of options granted     $ 43,470      
Directors Stock Option Plan [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options granted 210,000          
2013 Incentive Compensation Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options granted     0