Stock Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended				9 Months Ended
	Oct. 31, 2020	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Apr. 30, 2021
Share Based Payment Arrangement [Line Items]
Share based compensation arrangement by share based payment award, Options exercised in period, Total intrinsic value		$ 3,100				$ 3,500
Stock-based compensation expense		2,452	$ 933			$ 6,139	$ 2,050
Number of shares issued under share-based payment arrangement						15,328
Unvested Stock Options [Member]
Share Based Payment Arrangement [Line Items]
Share based compensation, Nonvested awards, Compensation cost not yet recognized Stock options and equity instruments other than options		$ 19,200				$ 19,200
Employee Stock Purchase Plan ESPP [Member]
Share Based Payment Arrangement [Line Items]
Common stock capital, Shares reserved for future issuance									429,934
2021 Equity Incentive Plan [Member]
Share Based Payment Arrangement [Line Items]
Common stock capital, Shares reserved for future issuance									3,260,753
Share-based compensation arrangement by share-based payment award, Number of shares available for issuance		1,162,962				1,162,962
2017 and 2021 Amended Equity Incentive Plan [Member]
Share Based Payment Arrangement [Line Items]
Share based compensation arrangement by share based payment award, Options granted in period, Weighted average grant date fair value		$ 15.46				$ 13.70
2017 and 2021 Amended Equity Incentive Plan [Member] | Unvested Stock Options [Member]
Share Based Payment Arrangement [Line Items]
Share based compensation, Nonvested awards, Compensation cost not yet recognized period of recognition stock options and equity instruments other than options						2 years 7 months 6 days
2017 and 2021 Amended Equity Incentive Plan [Member] | Unvested Stock Options And Restricted Stock Unit [Member]
Share Based Payment Arrangement [Line Items]
Share based compensation, Nonvested awards, Compensation cost not yet recognized Stock options and equity instruments other than options		$ 4,200				$ 4,200
Restricted Stock [Member]
Share Based Payment Arrangement [Line Items]
Weighted average Grant date fair value		$ 18.84				$ 18.84		$ 23.99
Restricted Stock [Member] | Unvested Stock Options And Restricted Stock Unit [Member]
Share Based Payment Arrangement [Line Items]
Share based compensation, Nonvested awards, Compensation cost not yet recognized period of recognition stock options and equity instruments other than options						1 year 10 months 13 days
Restricted Stock [Member] | 2017 and 2021 Amended Equity Incentive Plan [Member]
Share Based Payment Arrangement [Line Items]
Share based compensation arrangement by share based payment award, Vesting period	1 year
Weighted average Grant date fair value	$ 6.37
Stock-based compensation expense						$ 0	$ 200
ESPP [Member]
Share Based Payment Arrangement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock Percent of Fair Market Value						85.00%
Share purchases funded through payroll deductions for employee's eligible minimum annual compensation, percentage						1.00%
Share purchases funded through payroll deductions for employee's eligible maximum annual compensation, percentage		15.00%				15.00%
Potential increase in shares reserved for future issuance (in shares)						440,502
Potential increase in shares reserved for future issuance as percentage of outstanding share						1.00%
Restricted Stock Units (RSUs) [Member] | 2017 and 2021 Amended Equity Incentive Plan [Member]
Share Based Payment Arrangement [Line Items]
Stock-based compensation expense						$ 1,600
Common Class A [Member]
Share Based Payment Arrangement [Line Items]
Number of options, Granted				32,122	113,683
Common Class A [Member] | Restricted Stock [Member]
Share Based Payment Arrangement [Line Items]
Share based compensation arrangement by share based payment award, Restricted shares of fully issued and outstanding common stock	49,636