Consolidated Statement of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (45,960)	$ (40,151)
Foreign currency translation adjustments	58	(49)
Total comprehensive loss	$ (45,902)	$ (40,200)