Cash, Cash Equivalents and Short-Term Investments - Schedule of Cash and Short Term Investments (Details) $ in Thousands	Jul. 31, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 521,952
Gross Unrealized Gains	47
Gross Unrealized Losses	(2,566)
Fair Value	519,433
Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	410,761
Gross Unrealized Gains	0
Gross Unrealized Losses	(4)
Fair Value	410,757
Cash \| Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	281,339
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	281,339
Money market funds \| Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	111,927
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	111,927
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	46,197
Gross Unrealized Gains	0
Gross Unrealized Losses	(190)
Fair Value	46,007
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	48,251
Gross Unrealized Gains	17
Gross Unrealized Losses	(202)
Fair Value	48,066
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,974
Gross Unrealized Gains	0
Gross Unrealized Losses	(11)
Fair Value	1,963
Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,185
Gross Unrealized Gains	0
Gross Unrealized Losses	(7)
Fair Value	2,178
U.S. Agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	18,585
Gross Unrealized Gains	20
Gross Unrealized Losses	(35)
Fair Value	18,570
U.S. Agency securities \| Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,996
Gross Unrealized Gains	0
Gross Unrealized Losses	(4)
Fair Value	9,992
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	404,760
Gross Unrealized Gains	10
Gross Unrealized Losses	(2,121)
Fair Value	402,649
U.S. Treasury securities \| Cash and Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,499
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	$ 7,499

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).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

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-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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