Financial Assets and Liabilities - Short-term investments (Details) - USD ($) $ in Thousands	Jan. 31, 2024	Oct. 31, 2023
Cash Equivalents and Short-term Investments [Line Items]
Total	$ 154,564	$ 152,725
Gross Unrealized Gains	285	34
Gross Unrealized Losses Less Than 12 Continuous Months	(122)	(609)
Gross Unrealized Losses 12 Continuous Months or Longer	(237)	(511)
Estimated fair value	154,490	151,639
Cash equivalents
Cash Equivalents and Short-term Investments [Line Items]
Total	47,637	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	47,637	13,123
Cash equivalents | Money market funds
Cash Equivalents and Short-term Investments [Line Items]
Total	44,751	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	44,751	10,129
Cash equivalents | U.S. Treasury, agency & T-bills
Cash Equivalents and Short-term Investments [Line Items]
Total	2,886	2,994
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	2,886	2,994
Short-term Investments | U.S. Treasury, agency & T-bills
Cash Equivalents and Short-term Investments [Line Items]
Total	16,778	15,752
Gross Unrealized Gains	6	0
Gross Unrealized Losses Less Than 12 Continuous Months	(29)	(61)
Gross Unrealized Losses 12 Continuous Months or Longer	0	(2)
Estimated fair value	16,755	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	(9)	(16)
Estimated fair value	506	499
Short-term Investments | Corporate debt securities
Cash Equivalents and Short-term Investments [Line Items]
Total	102,108	103,213
Gross Unrealized Gains	208	13
Gross Unrealized Losses Less Than 12 Continuous Months	(81)	(455)
Gross Unrealized Losses 12 Continuous Months or Longer	(173)	(396)
Estimated fair value	102,062	102,375
Short-term Investments | Asset-backed securities
Cash Equivalents and Short-term Investments [Line Items]
Total	35,163	33,245
Gross Unrealized Gains	71	21
Gross Unrealized Losses Less Than 12 Continuous Months	(12)	(93)
Gross Unrealized Losses 12 Continuous Months or Longer	(55)	(97)
Estimated fair value	$ 35,167	$ 33,076