Stock-Based Compensation - Schedule of Stock Based Compensation Expense (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | |||
| Stock Based Compensation Expense | $ 10,552 | $ 7,110 | $ 5,299 |
| Research and Development Expense [Member] | |||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | |||
| Stock Based Compensation Expense | 6,626 | 4,453 | 3,437 |
| General and Administrative Expense [Member] | |||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | |||
| Stock Based Compensation Expense | $ 3,926 | $ 2,657 | $ 1,862 |