Fair Value Measurements - Schedule of Investments in Marketable Securities (Details) - USD ($) $ in Thousands	Jan. 31, 2026	Jan. 31, 2025
Current assets
Amortized Cost	$ 233,069	$ 281,484
Gross Unrealized Gains	1,158	793
Gross Unrealized Losses	(17)	(121)
Estimated Fair Value	234,210	282,156
U.S. Treasury securities
Current assets
Amortized Cost	141,589	155,017
Gross Unrealized Gains	734	254
Gross Unrealized Losses	(17)	(105)
Estimated Fair Value	142,306	155,166
Commercial paper
Current assets
Amortized Cost	8,446
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Estimated Fair Value	8,446
Corporate bonds
Current assets
Amortized Cost	73,338	105,532
Gross Unrealized Gains	422	487
Gross Unrealized Losses	0	(10)
Estimated Fair Value	73,760	106,009
U.S. agency bonds
Current assets
Amortized Cost	9,696	20,935
Gross Unrealized Gains	2	52
Gross Unrealized Losses	0	(6)
Estimated Fair Value	$ 9,698	$ 20,981

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- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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- Definition

Amount, before tax, of unrealized loss 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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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- Definition

Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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Amount excluding accrued interest, of 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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