Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Number of Shares
Beginning balance (in shares)	1,916,051
Granted (in shares)	339,950
Forfeited (in shares)	(412,328)
Ending balance (in shares)	1,843,673	1,916,051
Number of shares Options, Exercisable (in shares)	1,119,308
Number of shares Options, Vested and expected to vest (in shares)	1,670,385
Weighted Average Exercise Price
Beginning balance (in usd per share)	$ 10.01
Granted (in usd per share)	1.60
Forfeited (in usd per share)	11.59
Ending balance (in usd per share)	8.11	$ 10.01
Weighted average exercise price, Exercisable (in usd per share)	10.12
Weighted average exercise price, Vested and expected to vest (in usd per share)	$ 8.52
Weighted average contractual term outstanding (in years)	6 years 6 months	7 years 9 months 18 days
Weighted average contractual term outstanding, Exercisable (in years)	6 years 6 months
Weighted average contractual term outstanding, Vested and expected to vest (in years)	7 years 2 months 12 days
Aggregate intrinsic value, Beginning balance	$ 0
Aggregate intrinsic value, Ending balance	73	$ 0
Aggregate intrinsic value, exercisable	0
Aggregate intrinsic value, vested and expected to vest	$ 46