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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 |  |  |  |  |  |  |

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