Income Taxes - Schedule of Components of Loss Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Income Tax Disclosure [Abstract]
U.S.	$ (85,865)	$ (74,133)	$ (47,314)
Foreign	(3,196)	(3,326)	(3,035)
Loss before (provision) benefit for income taxes	$ (89,061)	$ (77,459)	$ (50,349)