Stock-Based Compensation - Summary of Assumptions Used for Valuation of Fair Value of Stock (Detail) - Black-Scholes Option-Pricing Model [Member]	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Expected volatility	90.00%	90.00%
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Risk-free interest rate, minimum	1.71%	0.40%
Expected term in years	5 years 9 months 18 days	5 years 3 months 18 days
Maximum [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Risk-free interest rate, maximum	4.17%	1.10%
Expected term in years	6 years 1 month 6 days	6 years 1 month 6 days