Financial Assets and Liabilities - Short-term investments (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Oct. 31, 2023
Cash Equivalents and Short-term Investments [Line Items]
Total	$ 156,987	$ 152,725
Gross Unrealized Gains	140	34
Gross Unrealized Losses Less Than 12 Continuous Months	(213)	(609)
Gross Unrealized Losses 12 Continuous Months or Longer	(134)	(511)
Estimated fair value	156,780	151,639
Cash equivalents
Cash Equivalents and Short-term Investments [Line Items]
Total	46,938	13,123
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	46,938	13,123
Cash equivalents | Money market funds
Cash Equivalents and Short-term Investments [Line Items]
Total	46,938	10,129
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	46,938	10,129
Cash equivalents | U.S. Treasury, agency & T-bills
Cash Equivalents and Short-term Investments [Line Items]
Total		2,994
Gross Unrealized Gains		0
Gross Unrealized Losses Less Than 12 Continuous Months		0
Gross Unrealized Losses 12 Continuous Months or Longer		0
Estimated fair value		2,994
Short-term Investments | U.S. Treasury, agency & T-bills
Cash Equivalents and Short-term Investments [Line Items]
Total	18,739	15,752
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less Than 12 Continuous Months	(38)	(61)
Gross Unrealized Losses 12 Continuous Months or Longer	(3)	(2)
Estimated fair value	18,698	15,689
Short-term Investments | Municipal bonds
Cash Equivalents and Short-term Investments [Line Items]
Total	515	515
Gross Unrealized Gains	0	0
Gross Unrealized Losses Less Than 12 Continuous Months	0	0
Gross Unrealized Losses 12 Continuous Months or Longer	(4)	(16)
Estimated fair value	511	499
Short-term Investments | Corporate debt securities
Cash Equivalents and Short-term Investments [Line Items]
Total	104,522	103,213
Gross Unrealized Gains	101	13
Gross Unrealized Losses Less Than 12 Continuous Months	(154)	(455)
Gross Unrealized Losses 12 Continuous Months or Longer	(84)	(396)
Estimated fair value	104,385	102,375
Short-term Investments | Asset-backed securities
Cash Equivalents and Short-term Investments [Line Items]
Total	33,211	33,245
Gross Unrealized Gains	39	21
Gross Unrealized Losses Less Than 12 Continuous Months	(21)	(93)
Gross Unrealized Losses 12 Continuous Months or Longer	(43)	(97)
Estimated fair value	$ 33,186	$ 33,076