Summary of Significant Accounting Policies - Fair Value of Stock Options Assumptions Using Black-Scholes Option Valuation Model (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Risk-free interest rate, Minimum	3.51%	1.63%
Risk-free interest rate, Maximum	4.01%	4.21%
Expected volatility, Minimum	89.69%	74.49%
Expected volatility, Maximum	112.12%	88.75%
Maximum [Member]
Expected life in years	6 years 3 months	6 years 3 months
Minimum [Member]
Expected life in years	5 years 21 days	5 years 3 months 7 days