Share-Based Compensation - Assumptions Used for Calculating Value of Options Granted (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Dividend yield (as a percent)	0.00%	0.00%	0.00%
Expected volatility, minimum (as a percent)	74.80%	78.70%	89.40%
Expected volatility, maximum (as a percent)	78.00%	88.70%	94.90%
Weighted-average risk-free interest rate (as a percent)	3.92%	2.22%	0.87%
Expected term (in years)	6 years	5 years 10 months 24 days	5 years 10 months 24 days