Financial Assets and Liabilities - Summary of Cash, Cash Equivalents and Investments (Detail) - USD ($) $ in Thousands		Oct. 31, 2022	Oct. 31, 2021
Cash, Cash Equivalents and Investments [Line Items]
Total		$ 150,511	$ 148,195
Gross Unrealized Gains		7	13
Gross Unrealized Losses Less Than 12 Continuous Months		(1,082)	(259)
Gross Unrealized Losses 12 Continuous Months or Longer		(1,523)	0
Estimated Fair Value	[1]	147,913	147,949
Cash equivalents:
Cash, Cash Equivalents and Investments [Line Items]
Total		77,683	172,934
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]	77,683	172,934
Money market funds | Cash equivalents:
Cash, Cash Equivalents and Investments [Line Items]
Total		77,683	172,934
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]	77,683	172,934
U.S. government agency & T-bills | Short-term Investments
Cash, Cash Equivalents and Investments [Line Items]
Total		25,816	6,447
Gross Unrealized Gains		0	0
Gross Unrealized Losses Less Than 12 Continuous Months		(174)	(5)
Gross Unrealized Losses 12 Continuous Months or Longer		(39)	0
Estimated Fair Value	[1]	25,603	6,442
Municipal bonds | Short-term Investments
Cash, Cash Equivalents and Investments [Line Items]
Total		2,970	4,588
Gross Unrealized Gains		0	0
Gross Unrealized Losses Less Than 12 Continuous Months		(12)	(12)
Gross Unrealized Losses 12 Continuous Months or Longer		(80)	0
Estimated Fair Value	[1]	2,878	4,576
Corporate debt securities | Short-term Investments
Cash, Cash Equivalents and Investments [Line Items]
Total		95,899	103,615
Gross Unrealized Gains		7	7
Gross Unrealized Losses Less Than 12 Continuous Months		(747)	(170)
Gross Unrealized Losses 12 Continuous Months or Longer		(1,135)	0
Estimated Fair Value	[1]	94,024	103,452
Asset-backed securities | Short-term Investments
Cash, Cash Equivalents and Investments [Line Items]
Total		25,826	33,545
Gross Unrealized Gains		0	6
Gross Unrealized Losses Less Than 12 Continuous Months		(149)	(72)
Gross Unrealized Losses 12 Continuous Months or Longer		(269)	0
Estimated Fair Value	[1]	$ 25,408	$ 33,479

[1] See Note 8. Fair Value Measurements for further discussion on fair values.