Equity-Based Compensation - Summary of Weighted Average Assumptions Used to Compute Fair Value of Option Granted (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			4.40%	1.90%
Expected term			6 years	5 years 10 months 24 days
Expected volatility of underlying stock			78.70%	76.20%
Expected dividend yield			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	5.53%	2.52%
Risk-free interest rate, Minimum			4.70%	0.22%
Risk-free interest rate , Maximum			5.53%	2.52%
Expected term	6 months	6 months	6 months	6 months
Expected volatility of underlying stock	60.40%	95.30%
Expected volatility of underlying stock, Minimum			60.40%	63.60%
Expected volatility of underlying stock, Maximum			69.20%	95.30%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%