XML 63 R52.htm IDEA: XBRL DOCUMENT v3.20.2
Stock-based Compensation (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Jan. 31, 2020
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock option compensation expense   $ 1.7   $ 0.1 $ 4.1 $ 0.4
RSU            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock units granted (in shares)         1,700,000  
Estimated grant date fair value of options and RSUs granted         $ 25.1  
RSU | Employee            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period         5 years  
RSU | Minimum | Director            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period         6 months  
RSU | Maximum | Director            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period         1 year  
Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award termination period 10 years          
Purchase price of common stock as a percent         100.00%  
Class A-1 Common Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options granted (in shares)   200,000 1,200,000      
Vesting period   4 years 5 years      
Class A-1 Common Stock | Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Class A1 common stock authorized (in shares) 6,000,000