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Statement of Comprehensive Loss Statement - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (15,881)	$ (17,001)	$ (33,238)	$ (43,924)
Foreign currency translation adjustments	(128)	199	(41)	161
Total comprehensive loss	$ (16,009)	$ (16,802)	$ (33,279)	$ (43,763)

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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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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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