Stock-based Compensation - Schedule of Assumptions Used to Estimate Fair Value of Each Employee and Non-employee Stock Award on Grant Date Using Black Scholes Option Pricing Model (Detail) - Employee and Nonemployee Stock Option [Member]	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Volatility	80.00%
Dividend	0.00%	0.00%	0.00%
Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Volatility		79.00%	76.00%
Expected term (in years)	5 years 6 months	5 years 6 months	5 years 10 months 24 days
Risk-free interest rate	3.75%	1.69%	0.62%
Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Volatility		81.00%	78.00%
Expected term (in years)	5 years 10 months 24 days	6 years 1 month 6 days	6 years 1 month 6 days
Risk-free interest rate	4.21%	4.23%	1.35%