CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) (PARENTHETICAL) - USD ($)	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2019
Vesting of early exercised stock options and restricted common stock	$ 5,592,000	$ 1,807,000
Additional Paid-in Capital
Vesting of early exercised stock options and restricted common stock	$ 5,592,000	1,807,000
Redeemable Convertible Preferred Stock, Series E
Issuance costs		$ 7.4617
Redeemable Convertible Preferred Stock, Series F
Price per share (in dollars per share)		$ 14.96125
Issuance costs		$ 53,000
Redeemable Convertible Preferred Stock, Series G-1 And G-2
Price per share (in dollars per share)	$ 38.77
Issuance costs	$ 230,000