CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Redeemable Convertible Preferred Stock	Class A And Class B Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning Balance at Jan. 31, 2021	$ (121,804)		$ 1	$ 94,159	$ (215,964)
Temporary Equity, Beginning Balance, Shares at Jan. 31, 2021		94,127,984
Temporary Equity, Beginning Balance at Jan. 31, 2021		$ 349,113
Beginning Balance, Shares at Jan. 31, 2021			65,577,877
Issuance of common stock upon exercise of stock options	1,851			1,851
Issuance of common stock upon exercise of stock options, Shares			841,169
Vesting of early exercised stock options	9			9
Issuance of common stock for restricted stock awards, Shares			5,314
Stock-based compensation	1,726			1,726
Net loss	(15,586)				(15,586)
Ending Balance at Apr. 30, 2021	(133,804)		$ 1	97,745	(231,550)
Temporary Equity, Ending Balance Shares at Apr. 30, 2021		94,127,984
Temporary Equity, Ending Balance at Apr. 30, 2021		$ 349,113
Ending Balance, Shares at Apr. 30, 2021			66,424,360
Beginning Balance at Jan. 31, 2022	1,282,291		$ 3	1,788,390	(506,102)
Beginning Balance, Shares at Jan. 31, 2022			182,166,560
Issuance of common stock upon exercise of stock options	521			521
Issuance of common stock upon exercise of stock options, Shares			838,725
Vesting of early exercised stock options	3			3
Issuance of common stock upon settlement of restricted stock units, shares			710,165
Tax withholdings on settlement of restricted stock units value	(125)			(125)
Tax withholdings on settlement of restricted stock units shares			(7,795)
Stock-based compensation	47,141			47,141
Net loss	(78,217)				(78,217)
Ending Balance at Apr. 30, 2022	$ 1,251,614		$ 3	$ 1,835,930	$ (584,319)
Ending Balance, Shares at Apr. 30, 2022			183,707,655