Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	Jul. 31, 2017	Oct. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 12,737	$ 12,119
Less: accumulated amortization	(8,190)	(7,908)
Intangible assets, net	4,547	4,211
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	7,878	7,802
Customer And Distributor Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	401	373
Trademarks And Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	268	254
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	891	849
Capitalized Software In Progress [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 3,299	$ 2,841