XML 73 R60.htm IDEA: XBRL DOCUMENT v3.21.2
Stockholders' Equity - Additional Information (Details) - Stock Options - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 20, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized stock-based compensation expense   $ 8.4   $ 8.4  
Unrecognized stock-based compensation expense, weighted-average recognition period       3 years 21 days  
Stock-based compensation expense   $ 0.5 $ 0.2 $ 1.5 $ 0.5
2018 Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Additional Award 0        
Date of grant 10 years        
Number of shares available for grant 10,000,000        
2018 Incentive Plan | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 4 years        
2018 Incentive Plan | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 5 years        
2021 Stock Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for grant 1,000,000