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Stock-Based Benefit Plans (Details Textual) - USD ($) $ in Millions | Apr. 30, 2018 | Oct. 31, 2017
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unamortized value of outstanding stock-based compensation awards | $ 34.3 | $ 24.2

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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