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Stockholders' Equity (Deficit) and Redeemable Convertible Preferred Stock - Additional Information (Detail) - USD ($)
 2 Months Ended 3 Months Ended 9 Months Ended
Mar. 28, 2025
May 02, 2024
Jul. 24, 2020
Jun. 10, 2020
Aug. 13, 2020
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Apr. 30, 2025
Oct. 29, 2024
Nov. 30, 2023
Temporary Equity And Shareholders Equity [Line Items]                        
Repurchase of common stock           $ 500,000 $ 3,600,000 $ 16,200,000 $ 5,400,000      
November 2023 Share Repurchase Program [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Repurchase of common stock             $ 3,600,000   $ 5,400,000      
Repurchase of common stock, shares             742,939   1,038,589      
October 2024 and April 2025 Share Repurchase Program [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Repurchase of common stock           $ 500,000   $ 16,200,000        
Repurchase of common stock, shares           116,094   3,776,218        
April 2025 Share Repurchase Program [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Stock repurchase program, remaining authorized repurchase amount           $ 20,300,000   $ 20,300,000        
Maximum [Member] | November 2023 Share Repurchase Program [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Stock repurchase program, authorized amount                       $ 25,000,000
Maximum [Member] | October 2024 Share Repurchase Program [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Stock repurchase program, authorized amount                     $ 25,000,000  
Maximum [Member] | April 2025 Share Repurchase Program [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Stock repurchase program, authorized amount                   $ 25,000,000    
Common Stock [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Shares issued           100,000 37,000 290,000 561,000      
Convertible preferred stock, each stock converted to common stock, shares   1.9717                    
Common stock shares issued as result of conversion of preferred securities                 140,782,000      
Repurchase of common stock, shares           116,000 743,000 3,776,000 1,038,000      
Redeemable Convertible Preferred Stock [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Redeemable convertible preferred stock conversion   71,402,607                    
Preferred stock cash dividend paid $ 8,600,000               $ 8,600,000      
Preferred stock cash dividend paid per share $ 0.12                      
Redeemable Convertible Preferred Stock [Member] | Common Stock [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Common stock shares issued as result of conversion of preferred securities   140,781,525                    
Initial Private Placement [Member] | Onex Partners V LP [Member] | Redeemable Convertible Preferred Stock [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Shares issued       47,058,332                
Aggregate purchase price per share       $ 5.6                
Preferred stock accretion rate per annum               7.00%        
Preferred stock, accretion of deemed dividend             $ 0   $ 12,700,000      
Rights Offering [Member] | Onex Partners V LP [Member] | Redeemable Convertible Preferred Stock [Member]                        
Temporary Equity And Shareholders Equity [Line Items]                        
Shares issued     1,727,427   69,718,919              
Proceeds from issuance of preferred stock     $ 9,700,000   $ 373,300,000              
Fees and estimated expenses         $ 17,200,000