Property and Equipment, Net - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Jan. 31, 2024	Oct. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment	$ 2,801	$ 2,316
Less: Accumulated depreciation and amortization	1,808	1,727
Property and equipment, net	993	589
Lab Equipment
Property, Plant and Equipment [Line Items]
Property and equipment	2,139	1,779
Computer Equipment
Property, Plant and Equipment [Line Items]
Property and equipment	288	269
Computer Software
Property, Plant and Equipment [Line Items]
Property and equipment	70	70
Office Furniture
Property, Plant and Equipment [Line Items]
Property and equipment	150	69
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment	$ 154	$ 129