Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017	Oct. 31, 2017
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ (7,014)	$ 4,439	$ (9,854)	$ 6,686
Income before income taxes	$ 4,038	$ 2,457	$ 10,081	$ 6,915
Effective tax rate	(173.70%)	180.70%	(97.70%)	97.00%
Net benefit related to a return to provision adjustment	$ 2,300		$ 2,300
Benefit based on adjusting the estimated annual tax rate	$ 5,500		5,500
Income Tax Examination [Line Items]
Unrecognized income tax benefits			2,015
Tax benefit due to enactment of TCJA			$ 3,966
U.S. | Internal Revenue Service
Income Tax Examination [Line Items]
Tax contingency					$ 4,700