Investments - Available-for-Sale Marketable Securities, Fair Value and Unrealized Losses Continuous Unrealized Loss Position (Details) $ in Thousands	Oct. 31, 2021 USD ($)
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	$ (75)
AFS, Less Than 12 Months, Fair Value	131,667
AFS, 12 Months or Greater, Unrealized Losses	(194)
AFS, 12 Months or Greater, Fair Value	99,207
AFS, Total Unrealized Losses	(269)
AFS, Total Fair Value	230,874
Certificates of deposit
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	(1)
AFS, Less Than 12 Months, Fair Value	29,399
AFS, 12 Months or Greater, Unrealized Losses	0
AFS, 12 Months or Greater, Fair Value	0
AFS, Total Unrealized Losses	(1)
AFS, Total Fair Value	29,399
U.S. government agencies securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	0
AFS, Less Than 12 Months, Fair Value	0
AFS, 12 Months or Greater, Unrealized Losses	(22)
AFS, 12 Months or Greater, Fair Value	15,793
AFS, Total Unrealized Losses	(22)
AFS, Total Fair Value	15,793
Commercial paper
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	(1)
AFS, Less Than 12 Months, Fair Value	29,667
AFS, 12 Months or Greater, Unrealized Losses	0
AFS, 12 Months or Greater, Fair Value	0
AFS, Total Unrealized Losses	(1)
AFS, Total Fair Value	29,667
Corporate debt securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
AFS, Less Than 12 Months, Unrealized Losses	(73)
AFS, Less Than 12 Months, Fair Value	72,601
AFS, 12 Months or Greater, Unrealized Losses	(172)
AFS, 12 Months or Greater, Fair Value	83,414
AFS, Total Unrealized Losses	(245)
AFS, Total Fair Value	$ 156,015

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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