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Stock Compensation - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Proceeds from exercise of stock options |  |  |  |  |  |  | $ 12,793 | $ 7,531
Number of options, Outstanding | 11,330,004 |  |  |  |  |  | 11,330,004 |
Common Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock options exercised | 879,000 | 407,000 | 975,000 | 746,000 | 491,000 | 664,000 |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation expense related to non-vested stock compensation awards granted under the Plan | $ 6,200 |  |  |  |  |  | $ 6,200 |
Expected remaining weighted average vesting period |  |  |  |  |  |  | 2 years 6 months |
Non-cash stock-based compensation expense | $ 900 |  |  | $ 800 |  |  | $ 3,400 | $ 4,500
Common stock granted | 0 |  |  | 0 |  |  | 18,700 | 35,693
Two Thousand Eighteen Stock Incentive Plan [Member] | Common Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Common stock shares available for future issuance under the Plan | 6,739,236 |  |  |  |  |  | 6,739,236 |
Options to Purchase Common Stock [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock options exercised | 879,014 |  |  | 745,195 |  |  | 2,260,541 | 1,901,467
Proceeds from exercise of stock options | $ 5,800 |  |  | $ 4,000 |  |  | $ 12,800 | $ 7,500
Stock option granted, contractual term | 7 years |  |  | 7 years |  |  | 7 years | 7 years
Common stock unit granted | 82,500 |  |  | 40,000 |  |  | 773,903 | 880,995
Unrecognized compensation expense related to non-vested stock compensation awards granted under the Plan | $ 32,200 |  |  |  |  |  | $ 32,200 |
Expected remaining weighted average vesting period |  |  |  |  |  |  | 2 years 4 months 24 days |
Non-cash stock-based compensation expense | $ 4,800 |  |  | $ 3,600 |  |  | $ 15,700 | $ 12,600
Stock options to purchase shares of common stock | 6,338,132 |  |  |  |  |  | 6,338,132 |

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