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Fair Value Measurements - Schedule of Investments in Marketable Securities (Details) - USD ($) $ in Thousands	Jul. 31, 2025	Jan. 31, 2025
Current assets
Amortized Cost	$ 290,282	$ 281,484
Gross Unrealized Gains	888	793
Gross Unrealized Losses	(96)	(121)
Estimated Fair Value	291,074	282,156
U.S. Treasury securities
Current assets
Amortized Cost	154,788	155,017
Gross Unrealized Gains	424	254
Gross Unrealized Losses	(92)	(105)
Estimated Fair Value	155,120	155,166
Commercial paper
Current assets
Amortized Cost	3,983
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Estimated Fair Value	3,983
Corporate bonds
Current assets
Amortized Cost	101,520	105,532
Gross Unrealized Gains	457	487
Gross Unrealized Losses	(4)	(10)
Estimated Fair Value	101,973	106,009
U.S. agency bonds
Current assets
Amortized Cost	29,991	20,935
Gross Unrealized Gains	7	52
Gross Unrealized Losses	0	(6)
Estimated Fair Value	$ 29,998	$ 20,981

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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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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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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).

+ References

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-SubTopic 30
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-Section 45
-Paragraph 1
-Publisher FASB
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