Stock-Based Compensation - Summary of Weighted Average Assumptions Used to Compute Fair Value of Option Granted (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Risk-free interest rate	4.30%	4.10%	4.20%	4.40%
Expected term	5 years 7 months 6 days	5 years 7 months 6 days	6 years	6 years
Expected volatility of underlying stock	76.30%	78.80%	76.40%	78.70%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
2016 Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Risk-free interest rate	5.24%	4.70%	5.24%	4.70%
Expected term	6 months	6 months	6 months	6 months
Expected volatility of underlying stock	56.70%	69.20%	56.70%	69.20%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%