Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2026	Jan. 31, 2025
Deferred tax assets:
Net operating loss carryforwards	$ 384,696	$ 284,870
Tax credit carryforwards	149,433	123,900
Stock-based compensation	8,623	12,090
Reserves and accrued expenses	7,877	6,815
Operating lease liabilities	48,065	52,849
R&D expense capitalization under Sec. 174	94,996	169,447
Other	23	34
Total deferred tax assets	693,713	650,005
Valuation allowance	(654,220)	(601,313)
Total deferred tax assets, net of valuation allowance	39,493	48,692
Deferred tax liabilities:
Right of use asset	(30,481)	(39,286)
Deferred commissions	(9,253)	(8,634)
Depreciation and amortization	(1,749)	(2,354)
Total deferred tax liabilities	(41,483)	(50,274)
Net deferred tax liabilities	$ (1,990)	$ (1,582)