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Statement of Comprehensive Loss Statement - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Jul. 31, 2017
Jul. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]        
Net loss $ (17,001) $ (11,067) $ (43,924) $ (38,260)
Foreign currency translation adjustments 199 (228) 161 (26)
Total comprehensive loss $ (16,802) $ (11,295) $ (43,763) $ (38,286)