XML 50 R40.htm IDEA: XBRL DOCUMENT v3.19.1
Stock-Based Compensation (Details Textual) - USD ($)
1 Months Ended 3 Months Ended
Oct. 16, 2013
Mar. 31, 2019
Mar. 31, 2018
Stock Based Compensation [Abstract]      
Stock-Based Compensation expense   $ 0 $ 0
Increase in number of common stock shares authorized 233,334    
Percentage to retain annual restricted stock awards 50.00%    
Stock options exercise price description may not be exercised at a price which is less than 100% of the fair market value of shares at the date of grant.    
Restricted stock [Member]      
Stock Based Compensation [Abstract]      
Stock-Based Compensation expense   559,000 551,000
Recognized tax benefits   $ 62,000 $ 63,000
Common Class A [Member] | Stock Option [Member]      
Stock Based Compensation [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 990,000    
Common Class A [Member] | Incentive Compensation Plan [Member]      
Stock Based Compensation [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 620,000    
Common Class B [Member]      
Stock Based Compensation [Abstract]      
Increase in number of common stock shares authorized 90,000    
Common Class B [Member] | Stock Option [Member]      
Stock Based Compensation [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 370,000    
Common Class B [Member] | Incentive Compensation Plan [Member]      
Stock Based Compensation [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 370,000