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Share-Based Compensation - Restricted Stock Units Narratives (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
shares
Sep. 30, 2021
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award    
Share based compensation not yet recognized for unvested shares vesting period   2 years 8 months 15 days
Vested in period, excluded (in shares) 40,000  
Tranche Two    
Share-based Compensation Arrangement by Share-based Payment Award    
Stock options vesting period   3 years
Tranche One    
Share-based Compensation Arrangement by Share-based Payment Award    
Stock option vesting right percentage   25.00%
Stock options vesting period   4 years
RSUs    
Share-based Compensation Arrangement by Share-based Payment Award    
Share based compensation not yet recognized for unvested shares other than options | $ $ 1.3 $ 1.3
Share based compensation not yet recognized for unvested shares vesting period   2 years 18 days
Canceled of forfeited (in shares)   320,850
Vested in period, excluded (in shares)   41,125
RSUs | Tranche Two    
Share-based Compensation Arrangement by Share-based Payment Award    
Stock option vesting right percentage   50.00%
Stock options vesting period   18 months
RSUs | Tranche One    
Share-based Compensation Arrangement by Share-based Payment Award    
Stock option vesting right percentage   50.00%
Stock options vesting period   18 months
RSUs | Tranche Three    
Share-based Compensation Arrangement by Share-based Payment Award    
Stock option vesting right percentage   100.00%
Stock options vesting period   2 years
Restricted Stock Units (RSUs), Performance Conditions    
Share-based Compensation Arrangement by Share-based Payment Award    
Share-based compensation arrangement by share-based payment award, shares issued in period   1,020,000
Canceled of forfeited (in shares)   140,000