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Equity Plans and Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
May 28, 2014 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | May 31, 2022 | Jun. 30, 2021 | May 31, 2021 | Jan. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Increase in aggregate number of shares of common stock authorized for issuance |  |  |  |  | 15,000,000 |  | 1,000,000 |
Stock-based compensation expense |  | $ 0 | $ 2,774 | $ 3,075 |  |  |  |
Expected dividend yield |  | 0.00% |  |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock based compensation expense related to restricted stock |  | $ 20,400 | 13,200 | 7,900 |  |  |  |
Aggregate intrinsic value |  | 62,200 | 37,000 | 37,300 |  |  |  |
Fair value of restricted stock units |  | $ 16,100 | $ 15,700 | 4,700 |  |  |  |
Restricted stock unit awards outstanding |  | 4,445,000 | 3,479,000 |  |  |  |  |
Employee Stock Option |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options vesting period |  | 7 years |  |  |  |  |  |
Stock-based compensation expense |  | $ 18,700 | $ 17,200 | 11,100 |  |  |  |
Intrinsic value of options exercised |  | 5,000 | 7,700 | 7,900 |  |  |  |
Fair value of stock options vested |  | 19,500 | 17,500 | 9,000 |  |  |  |
Market Based Performance Stock Unit |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock based compensation expense related to restricted stock |  | 2,500 | 800 | 1,800 |  |  |  |
Aggregate intrinsic value |  | $ 7,800 | $ 2,100 | $ 3,300 |  |  |  |
Restricted stock unit awards outstanding |  | 557,000 | 193,000 |  |  |  |  |
Minimum | Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Expiration period |  | 7 years |  |  |  |  |  |
Maximum | Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Expiration period |  | 10 years |  |  |  |  |  |
2018 Equity Incentive Plan |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Newly reserved shares of common stock |  | 9,388,428 |  |  |  | 3,250,000 |  | 1,500,000
Time Based Vesting Schedule |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested equity awards |  | $ 46,100 |  |  |  |  |  |
Unrecognized compensation cost, weighted-average vesting period |  | 1 year 7 months 6 days |  |  |  |  |  |
Time Based Vesting Schedule | Performance Based Restricted Stock Units |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested equity awards |  | $ 5,500 |  |  |  |  |  |
Performance Based Vesting Schedule | Performance Based Restricted Stock Units |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Restricted stock unit awards outstanding |  | 36,000 |  |  |  |  |  |
2014 Employee Stock Purchase Plan |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested equity awards |  | $ 1,000 |  |  |  |  |  |
Unrecognized compensation cost, weighted-average vesting period |  | 1 year 2 months 12 days |  |  |  |  |  |
Shares issued to employees |  | 161,000 |  |  |  |  |  |
Shares remaining available for future purchases |  | 722,000 |  |  |  |  |  |
2014 Employee Stock Purchase Plan | The commencement of the offer period (generally, the sixteenth day in February or August) |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Purchase price per share as percentage of fair market value of common stock | 85.00% |  |  |  |  |  |  |
2014 Employee Stock Purchase Plan | The exercise date, which is the last day of a purchase period (generally, the fifteenth day in February or August) |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Purchase price per share as percentage of fair market value of common stock | 85.00% |  |  |  |  |  |  |
2014 Employee Stock Purchase Plan | Maximum |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares remaining available for future purchases |  |  |  |  | 32,600,000 |  | 1,850,000 |

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