Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Deferred tax assets:
Net operating loss carryforwards	$ 228,400	$ 174,646
Research and development expenses	72,432	36,989
Deferred revenue	25,643	14,748
Accruals and reserves	6,215	3,960
Operating lease liabilities	9,139	11,158
Stock-based compensation	17,528	7,936
Other	2,622	2,012
Gross deferred tax assets	361,979	251,449
Valuation allowance	(291,751)	(218,981)
Total deferred tax assets	70,228	32,468
Deferred tax liabilities:
Acquired intangibles, property and equipment	(37,170)	(6,235)
Deferred contract acquisition costs	(22,868)	(16,722)
Operating lease right-of-use assets	(8,162)	(9,422)
Other	(2,279)	0
Total deferred tax liabilities	(70,479)	(32,379)
Net deferred tax assets (liabilities)	$ (251)
Net deferred tax assets (liabilities)		$ 89