Financial Assets and Liabilities - Summary of Cash Equivalents and Short-term Investments (Detail) - USD ($) $ in Thousands		Oct. 31, 2021	Oct. 31, 2020
Cash, Cash Equivalents and Investments [Line Items]
Total		$ 148,195
Gross Unrealized Gains		13
Gross Unrealized Losses Less Than 12 Continuous Months		(259)
Gross Unrealized Losses 12 Continuous Months or Longer		0
Estimated Fair Value		147,949
Cash equivalents:
Cash, Cash Equivalents and Investments [Line Items]
Total		172,934	$ 304,127
Gross Unrealized Gains		0	0
Gross Unrealized Losses Less Than 12 Continuous Months		0	0
Gross Unrealized Losses 12 Continuous Months or Longer		0	0
Estimated Fair Value	[1]	172,934	304,127
Other long-term assets:
Cash, Cash Equivalents and Investments [Line Items]
Total		17,638	13,200
Gross Unrealized Gains		0	0
Gross Unrealized Losses Less Than 12 Continuous Months		0	0
Gross Unrealized Losses 12 Continuous Months or Longer		0	0
Estimated Fair Value	[1]	17,638	13,200
Money market funds | Cash equivalents:
Cash, Cash Equivalents and Investments [Line Items]
Total		172,934	304,127
Gross Unrealized Gains		0	0
Gross Unrealized Losses Less Than 12 Continuous Months		0	0
Gross Unrealized Losses 12 Continuous Months or Longer		0	0
Estimated Fair Value	[1]	172,934	304,127
US Government Agencies Debt Securities and US Treasury Bill Securities | Short-term Investments
Cash, Cash Equivalents and Investments [Line Items]
Total		6,447
Gross Unrealized Gains		0
Gross Unrealized Losses Less Than 12 Continuous Months		(5)
Gross Unrealized Losses 12 Continuous Months or Longer		0
Estimated Fair Value		6,442
Municipal Bonds | Short-term Investments
Cash, Cash Equivalents and Investments [Line Items]
Total		4,588
Gross Unrealized Gains		0
Gross Unrealized Losses Less Than 12 Continuous Months		(12)
Gross Unrealized Losses 12 Continuous Months or Longer		0
Estimated Fair Value		4,576
Corporate Debt Securities | Short-term Investments
Cash, Cash Equivalents and Investments [Line Items]
Total		103,615
Gross Unrealized Gains		7
Gross Unrealized Losses Less Than 12 Continuous Months		(170)
Gross Unrealized Losses 12 Continuous Months or Longer		0
Estimated Fair Value		103,452
Asset-backed Securities | Short-term Investments
Cash, Cash Equivalents and Investments [Line Items]
Total		33,545
Gross Unrealized Gains		6
Gross Unrealized Losses Less Than 12 Continuous Months		(72)
Gross Unrealized Losses 12 Continuous Months or Longer		0
Estimated Fair Value		33,479
Non-marketable equity securities | Other long-term assets:
Cash, Cash Equivalents and Investments [Line Items]
Total		17,638	13,200
Gross Unrealized Gains		0	0
Gross Unrealized Losses Less Than 12 Continuous Months		0	0
Gross Unrealized Losses 12 Continuous Months or Longer		0	0
Estimated Fair Value	[1]	$ 17,638	$ 13,200

[1] See Note 7. Fair Value Measures for further discussion on fair values.