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Stock-Based Compensation - Schedule of Employee Awards and Non-employee Director Award Plan Activity (Parenthetical) (Detail) - $ / shares
shares in Thousands
3 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
RSUs      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock units weighted average grant date fair value     $ 5.53
Employees Awards | RSUs      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock units weighted average grant date fair value $ 3.97 $ 4.26  
Vesting period 4 years 4 years  
Employees Awards | RSUs | Share-based Payment Arrangement, Tranche One      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Vesting period     1 year
Restricted stock units grant date fair value     202,237
Employees Awards | RSUs | Share-based Payment Arrangement, Tranche Two      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Vesting period     4 years
Restricted stock units grant date fair value     167,900
Employees Awards | Market RSU's      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock units weighted average grant date fair value   $ 9.30  
Vesting date   May 17, 2024  
Employees Awards | Market RSU's | Share-based Payment Arrangement, Tranche One      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   0.00%  
Employees Awards | Market RSU's | Share-based Payment Arrangement, Tranche Two      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   50.00%  
Employees Awards | Market RSU's | Index Target 50th Percentile      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   100.00%  
Employees Awards | Market RSU's | Index Target 75th Percentile      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   200.00%  
Employees Awards | Market RSU's | Index Target 90th Percentile or Higher      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   300.00%  
Non-employee Directors Awards | RSUs      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted stock units weighted average grant date fair value   $ 4.31