Property and Equipment, Net - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Oct. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment	$ 2,992	$ 2,316
Less: Accumulated depreciation and amortization	1,885	1,727
Property and equipment, net	1,107	589
Lab Equipment
Property, Plant and Equipment [Line Items]
Property and equipment	2,167	1,779
Computer Equipment
Property, Plant and Equipment [Line Items]
Property and equipment	287	269
Computer Software
Property, Plant and Equipment [Line Items]
Property and equipment	146	70
Office Furniture
Property, Plant and Equipment [Line Items]
Property and equipment	177	69
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment	$ 215	$ 129