Financial Assets and Liabilities - Short-term investments (Details) - USD ($) $ in Thousands	Jan. 31, 2023		Oct. 31, 2022
Cash Equivalents and Short-term Investments [Line Items]
Total	$ 148,490		$ 150,511
Gross Unrealized Gains	127		7
Gross Unrealized Losses Less Than 12 Continuous Months	(476)		(1,082)
Gross Unrealized Losses 12 Continuous Months or Longer	(1,091)		(1,523)
Estimated fair value	147,050	[1]	147,913	[2]
Cash equivalents
Cash Equivalents and Short-term Investments [Line Items]
Total	45,367		77,683
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	45,367	[1]	77,683	[2]
Cash equivalents | Money market funds
Cash Equivalents and Short-term Investments [Line Items]
Total	45,367		77,683
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	45,367	[1]	77,683	[2]
Short-term investments | U.S. government agency & T-bills
Cash Equivalents and Short-term Investments [Line Items]
Total	24,851		25,816
Gross Unrealized Gains	5		0
Gross Unrealized Losses Less Than 12 Continuous Months	(108)		(174)
Gross Unrealized Losses 12 Continuous Months or Longer	0		(39)
Estimated fair value	24,748	[1]	25,603	[2]
Short-term investments | Municipal bonds
Cash Equivalents and Short-term Investments [Line Items]
Total	2,695		2,970
Gross Unrealized Gains	0		0
Gross Unrealized Losses Less Than 12 Continuous Months	0		(12)
Gross Unrealized Losses 12 Continuous Months or Longer	(56)		(80)
Estimated fair value	2,639	[1]	2,878	[2]
Short-term investments | Corporate debt securities
Cash Equivalents and Short-term Investments [Line Items]
Total	93,437		95,899
Gross Unrealized Gains	103		7
Gross Unrealized Losses Less Than 12 Continuous Months	(304)		(747)
Gross Unrealized Losses 12 Continuous Months or Longer	(852)		(1,135)
Estimated fair value	92,384	[1]	94,024	[2]
Short-term investments | Asset-backed securities
Cash Equivalents and Short-term Investments [Line Items]
Total	27,507		25,826
Gross Unrealized Gains	19		0
Gross Unrealized Losses Less Than 12 Continuous Months	(64)		(149)
Gross Unrealized Losses 12 Continuous Months or Longer	(183)		(269)
Estimated fair value	$ 27,279	[1]	$ 25,408	[2]

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

[2] See Note 7. Fair Value Measurements for further discussion on fair values.