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Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Details) (Parenthetical) - USD ($) $ in Thousands | Oct. 31, 2019 | Oct. 31, 2018
--- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |  |
Additional long-term unbilled receivables | [1] | $ 6,139 | $ 10,632
Other Assets [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Additional long-term unbilled receivables |  | 3,600 | 9,400
Government [Member] |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
U.S. government accounts receivable, including unbilled receivables |  | $ 1,200 | $ 2,300
[1] | Additional long-term unbilled receivables of $3.6 million and $9.4 million are included within “Other Assets” as of October 31, 2019 and 2018, respectively. The balance decreased because amounts previously recorded in connection with the Bridgeport Fuel Cell Project service agreement were settled in connection with the acquisition of the Bridgeport Fuel Cell Project.

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- Definition U.S. government accounts receivable including unbilled receivables. + References No definition available. + 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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- Definition Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 310 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118261985&loc=d3e55302-109406 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(c)(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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