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Equity-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended
Nov. 19, 2020
Nov. 16, 2020
Nov. 14, 2019
Jun. 30, 2021
Oct. 22, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock options issued to holders of units, weighted average exercise price $ 13.78        
Stock options weighted average grant date fair value $ 6.71        
Non-cash equity-based compensation expense over the requisite service period $ 4.1        
Unamortized value of outstanding stock-based compensation       $ 29.5  
Unamortized value of outstanding stock-based compensation, weighted average remaining life       1 year 3 months 18 days  
ESPP          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Common stock shares available for sale         1,100,000
Common stock shares issued   120,000 172,000    
Restricted Stock Units (RSUs)          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Issued shares of common stock 733,000        
Weighted average exercise price $ 13.78        
Vesting period 4 years        
Vesting terms       anniversary of the grant date  
Non-cash equity-based compensation expense over the requisite service period $ 8.9        
Stock Options          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Vesting period 4 years        
Stock options issued to holders of units 686,000