Marketable Securities - Schedule of Available -for-Sale Marketable Securities (Details) - USD ($) $ in Thousands	Jul. 31, 2026	Jan. 31, 2026
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 221,669	$ 339,486
Unrealized Gains	4	107
Unrealized Losses	(185)	(56)
Fair Value	221,488	339,537
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	55,207	129,930
Unrealized Gains	0	60
Unrealized Losses	(30)	(16)
Fair Value	55,177	129,974
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,615	17,854
Unrealized Gains	0	3
Unrealized Losses	(4)	(2)
Fair Value	13,611	17,855
U.S. government and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	96,332	115,473
Unrealized Gains	2	14
Unrealized Losses	(118)	(33)
Fair Value	96,216	115,454
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,893	29,391
Unrealized Gains	2	19
Unrealized Losses	(8)	(1)
Fair Value	20,887	29,409
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	35,622	46,838
Unrealized Gains	0	11
Unrealized Losses	(25)	(4)
Fair Value	$ 35,597	$ 46,845

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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