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Equity Incentive Plans - Summary of Fair Value of Each Award Issued Estimated on the Date of Grant Using the Black-Scholes Option Pricing Model (Detail)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Expected term (in years) 6 years 29 days      
Expected volatility, Minimum 81.80% 81.70% 81.20% 78.80%
Expected volatility, Maximum 81.90% 82.70% 82.40% 82.80%
Risk-free interest rate, Minimum 4.20% 2.92% 3.47% 1.49%
Risk-free interest rate, Maximum 4.42% 3.61% 4.42% 3.61%
Minimum [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Expected term (in years)   5 years 9 months 7 days 5 years 6 months 5 years 6 months
Maximum [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Expected term (in years)   6 years 29 days 6 years 29 days 6 years 29 days