Stockholders' Equity (Deficit) - Summary of Common Shares Reserved for Future Issuance (Detail) - shares	Mar. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Total	11,089,378	9,328,168
Shares Underlying Outstanding Equity Awards [Member]
Class of Stock [Line Items]
Total	8,155,506	6,370,873
Shares Available For Future Equity Award Grants [Member]
Class of Stock [Line Items]
Total	2,891,729	2,931,012
Shares Underlying Early Exercised Equity Awards [Member]
Class of Stock [Line Items]
Total	21,951	26,283
Shares Underlying ESPP Withholdings [Member]
Class of Stock [Line Items]
Total	20,192	0