Common Stock - Summary Of Common Stock Capital Shares Reserved For Future Issuance (Detail)	Jul. 31, 2021 shares
Common Stock Capital Shares Reserved For Future Issuance [Line Items]
Total shares of common stock reserved	118,724,904
Restricted Stock Units and Outstanding [Member]
Common Stock Capital Shares Reserved For Future Issuance [Line Items]
Total shares of common stock reserved	4,017,149
Common stock reserved for Earnout [Member]
Common Stock Capital Shares Reserved For Future Issuance [Line Items]
Total shares of common stock reserved	39,249,702
Stock options issued and outstanding [Member]
Common Stock Capital Shares Reserved For Future Issuance [Line Items]
Total shares of common stock reserved	26,401,717
Shares available for grant under 2021 Equity Incentive Plan [Member]
Common Stock Capital Shares Reserved For Future Issuance [Line Items]
Total shares of common stock reserved	40,878,653
Shares available for grant under 2021 ESPP [Member]
Common Stock Capital Shares Reserved For Future Issuance [Line Items]
Total shares of common stock reserved	8,177,683