Preferred Stock - Schedule of Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 31, 2021	Jul. 01, 2021	Apr. 30, 2021	Jan. 31, 2021	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020
Temporary Equity [Line Items]
Shares Authorized (in shares)	0			168,985,413
Shares Issued (in shares)	0			167,058,113
Shares Outstanding (in shares)	0		167,058,113	167,058,113	144,929,131	144,929,131	113,523,948
Liquidation Amount	$ 0			$ 622,414
Carrying Value	$ 0		$ 621,139	$ 621,139	$ 354,365	$ 354,365	$ 201,826
Series Seed
Temporary Equity [Line Items]
Shares Authorized (in shares)				10,962,327
Shares Issued (in shares)				10,962,327
Shares Outstanding (in shares)				10,962,327
Liquidation Amount				$ 2,577
Carrying Value				$ 2,553
Original Issuance Price per Share (in USD per share)				$ 0.2351
Series A
Temporary Equity [Line Items]
Shares Authorized (in shares)				12,855,123
Shares Issued (in shares)				12,855,123
Shares Outstanding (in shares)				12,855,123
Liquidation Amount				$ 10,000
Carrying Value				$ 9,948
Original Issuance Price per Share (in USD per share)				$ 0.7779
Series B
Temporary Equity [Line Items]
Shares Authorized (in shares)				20,288,700
Shares Issued (in shares)				20,288,700
Shares Outstanding (in shares)				20,288,700
Liquidation Amount				$ 24,338
Carrying Value				$ 24,241
Original Issuance Price per Share (in USD per share)				$ 1.1996
Series C
Temporary Equity [Line Items]
Shares Authorized (in shares)				40,338,867
Shares Issued (in shares)				40,338,867
Shares Outstanding (in shares)				40,338,867
Liquidation Amount				$ 70,433
Carrying Value				$ 69,845
Original Issuance Price per Share (in USD per share)				$ 1.7460
Series D
Temporary Equity [Line Items]
Shares Authorized (in shares)				29,078,931
Shares Issued (in shares)				29,078,931
Shares Outstanding (in shares)				29,078,931
Liquidation Amount				$ 95,476
Carrying Value				$ 95,239
Original Issuance Price per Share (in USD per share)				$ 3.2833
Series E
Temporary Equity [Line Items]
Shares Authorized (in shares)				31,405,183
Shares Issued (in shares)				31,405,183
Shares Outstanding (in shares)		31,405,183		31,405,183
Liquidation Amount				$ 152,683
Carrying Value				$ 152,539
Original Issuance Price per Share (in USD per share)				$ 4.8617
Series F
Temporary Equity [Line Items]
Shares Authorized (in shares)				24,056,282
Shares Issued (in shares)				22,128,982
Shares Outstanding (in shares)				22,128,982
Liquidation Amount				$ 266,907
Carrying Value				$ 266,774
Original Issuance Price per Share (in USD per share)				$ 12.0614