Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Deferred tax assets:
Net operating losses	$ 167,218	$ 62,279	$ 28,920
Deferred revenue	2,687	3,493	3,279
Lease liability	4,772	4,943	5,449
Other accruals	5,542	2,436	479
Stock-based compensation	25,772	1,963	1,459
Credit carryforwards	18,883	6,468	4,829
Total deferred tax assets	224,874	81,582	44,415
Deferred tax liabilities:
Fixed assets	(2,837)	(943)	(489)
Right-of-use asset	(3,953)	(4,071)	(4,650)
Deferred commissions	(22,900)	(12,974)	(7,877)
Total deferred tax liabilities	(29,690)	(17,988)	(13,016)
Net deferred tax assets	195,184	63,594	31,399
Valuation allowance	(194,850)	(63,446)	$ (31,399)
Deferred tax assets, net of valuation allowance	$ 334	$ 148