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Consolidated Statement of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (18,917)	$ (14,769)	$ (64,877)	$ (54,920)
Foreign currency translation adjustments	(60)	(42)	(2)	(91)
Total comprehensive loss	$ (18,977)	$ (14,811)	$ (64,879)	$ (55,011)

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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