Stockholders' Equity (Deficit) - Summary of Common Shares Reserved for Future Issuance (Detail) - shares	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Total	9,328,168	7,928,031
Shares Underlying Outstanding Equity Awards [Member]
Class of Stock [Line Items]
Total	6,370,873	6,316,569
Shares Available For Future Equity Award Grants [Member]
Class of Stock [Line Items]
Total	2,931,012	1,506,806
Shares Underlying Early Exercised Equity Awards [Member]
Class of Stock [Line Items]
Total	26,283	100,263
Shares Underlying ESPP Withholdings [Member]
Class of Stock [Line Items]
Total	0	4,393