Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2025	Jan. 31, 2024
Deferred tax assets:
Net operating loss carryforwards	$ 207,838	$ 226,971
Research and development expenses	148,728	106,257
Deferred revenue	42,537	36,199
Accruals and reserves	11,042	9,265
Operating lease liabilities	5,349	7,492
Stock-based compensation	17,388	14,300
Other	11,495	7,111
Gross deferred tax assets	444,377	407,595
Valuation allowance	(381,956)	(340,951)
Total deferred tax assets	62,421	66,644
Deferred tax liabilities:
Acquired intangibles, property and equipment	(24,373)	(28,652)
Deferred contract acquisition costs	(36,313)	(30,423)
Operating lease right-of-use assets	(4,602)	(6,582)
Other	(563)	(1,782)
Total deferred tax liabilities	(65,851)	(67,439)
Net deferred tax liabilities	$ (3,430)	$ (795)