Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.20.1
Stock-Based Compensation (Narrative) (Details) - USD ($)
3 Months Ended 108 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
May 19, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of options outstanding 1,102,103   1,130,472  
Aggregate intrinsic value of options outstanding $ 400,000      
Intrinsic value of all options exercised 0      
Net cash proceeds from exercise of stock options 0 $ 0    
Share based compensation expense before income taxes 79,000 70,000    
Share based compensation expense after income taxes 63,000 $ 55,000    
Unrecognized compensation expense for awards $ 235,000      
Recognition period for unrecognized compensation expense 1 year 9 months 18 days      
2011 Executive Incentive Compensation Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of awards authorized       2,500,000
Shares issued under Plan 411,664      
Number of options outstanding 1,298,156      
Awards eligible for grant 790,180      
Employee Stock Purchase Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of price of common stock at which employees are able to acquire 85.00%      
Shares available 85,573      
Stock Option Plan For Directors [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of options granted 0   0  
Award expiration period 10 years      
Number of options outstanding 18,000