Annual report pursuant to Section 13 and 15(d)

Equity Incentive Plans and Stock Based Compensation - Stock-Based Compensation Expense (Detail)

v3.24.1
Equity Incentive Plans and Stock Based Compensation - Stock-Based Compensation Expense (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Total stock-based compensation $ 6,702 $ 11,909
2018 Equity Incentive Plan    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Unrecognized compensation cost related to unvested stock-based awards granted to employees under the equity incentive plans $ 4,700  
Unrecognized compensation cost related to unvested stock-based awards granted to employees under the equity incentive plans, period for recognition 2 years 4 months 28 days  
Research and Development    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Total stock-based compensation $ 2,833 6,096
General and Administrative    
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]    
Total stock-based compensation $ 3,869 $ 5,813