Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Status of Stock Options Related to Stock Plans (Details)

v3.19.3.a.u2
Employee Benefit Plans - Status of Stock Options Related to Stock Plans (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options Outstanding Beginning Balance 33,000    
Options Outstanding Exercised (33,000)    
Options Outstanding Ending Balance   33,000  
Weighted Average Exercise Price Per Share, Beginning Balance $ 1.81    
Weighted Average Exercise Price Per Share, Exercised $ 1.81    
Weighted Average Exercise Price Per Share, Ending Balance   $ 1.81  
Weighted Average Remaining Contractual Term   3 months 18 days  
Aggregate Intrinsic Value, Beginning Balance   $ 392  
Intrinsic value of stock options exercised $ 426 $ 3,564 $ 425
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercise Price Per Share, Beginning Balance $ 1.81    
Exercise Price Per Share, Exercised 1.81    
Exercise Price Per Share, Ending Balance   $ 1.81  
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercise Price Per Share, Beginning Balance 1.81    
Exercise Price Per Share, Exercised $ 1.81    
Exercise Price Per Share, Ending Balance   $ 1.81