Stock-Based Compensation - Summary of Assumptions Used in 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]
Risk-free interest rate	4.20%
Risk-free interest rate, minimum		2.65%	3.38%	1.70%
Risk-free interest rate, maximum		4.09%	4.22%	4.09%
Expected volatility	80.80%
Expected volatility, minimum		77.70%	76.30%	77.70%
Expected volatility, maximum		78.20%	81.30%	81.90%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Employee and Board of Directors Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life of options (in years)	6 years 3 months	6 years 3 months	6 years 3 months	6 years 3 months