Stock-Based Compensation - Summary of Stock Option Activity (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares
Number of Shares
Beginning Balance | shares	2,261,234
Granted | shares	1,326,675
Exercised | shares	(588,461)
Forfeited | shares	(200,060)
Expired | shares	(1,838)
Ending Balance | shares	2,797,550	2,261,234
Vested and expected to vest as of December 31, 2021 | shares	2,797,550
Options exercisable as of December 31, 2021 | shares	1,371,048
Weighted Average Exercise Price
Beginning Balance | $ / shares	$ 8.17
Granted | $ / shares	34.60
Exercised | $ / shares	1.65
Forfeited | $ / shares	28.10
Expired | $ / shares	31.76
Ending Balance | $ / shares	20.64	$ 8.17
Vested and expected to vest as of December 31, 2021 | $ / shares	20.64
Options exercisable as of December 31, 2021 | $ / shares	$ 11.80
Weighted Average Contractual Term
Options Outstanding	7 years 6 months 14 days	6 years 2 months 19 days
Vested and expected to vest as of December 31, 2021	7 years 6 months 14 days
Options exercisable as of December 31, 2021	6 years 1 month 9 days
Aggregate Intrinsic Value
Options Outstanding | $	$ 14,625	$ 26,671
Vested and expected to vest as of December 31, 2021 | $	14,625
Options exercisable as of December 31, 2021 | $	$ 13,143