INCOME TAXES - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2026	Jan. 31, 2025
Deferred tax assets:
Net operating loss carryforwards	$ 246,593	$ 207,838
Research and development expenses	172,338	148,728
Deferred revenue	49,987	42,537
Accruals and reserves	10,340	11,042
Operating lease liabilities	4,427	5,349
Stock-based compensation	20,032	17,388
Property and equipment	58	0
Other	16,016	11,495
Gross deferred tax assets	519,791	444,377
Valuation allowance	(437,044)	(381,956)
Total deferred tax assets	82,747	62,421
Deferred tax liabilities:
Acquired intangibles, property and equipment	(30,941)	(24,373)
Deferred contract acquisition costs	(38,776)	(36,313)
Operating lease right-of-use assets	(3,238)	(4,602)
Other	0	(563)
Total deferred tax liabilities	(72,955)	(65,851)
Net deferred tax liabilities	$ 9,792
Net deferred tax liabilities		$ (3,430)