Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Deferred tax assets
Net operating loss carryforwards	$ 428,238	$ 289,889
Research and other credit carryforwards	56,539	22,778
Intangible assets	61,008	0
Stock-based compensation	33,202	20,154
Deferred revenue	34,425	21,595
Accrued expenses	12,550	7,791
Operating lease liabilities	10,144	10,718
Capitalized research and development	154,625	63,158
Other, net	4,514	0
Gross deferred assets	795,245	436,083
Less: Valuation allowance	(770,861)	(413,828)	$ (207,600)
Total deferred tax assets	24,384	22,255
Deferred tax liabilities
Property and equipment, net	(8,769)	(4,446)
Capitalized Commissions	(1,632)	(2,960)
Intangible assets	0	(3,697)
Operating right-of-use assets	(9,256)	(9,610)
Other, net	0	(302)
Total deferred tax liabilities	(19,657)	(21,015)
Net deferred tax assets (liabilities)	$ 4,727	$ 1,240

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from in-process research and development costs expensed in connection with a business combination.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from provisions, reserves, allowances, and accruals, classified as other.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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