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Inventories - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2019 | Jul. 31, 2018 | Oct. 31, 2018
Inventory [Line Items] |  |  |  |  |
Long-term inventory | $ 2,179,000 |  | $ 2,179,000 |  |
Costs of Revenues [Member] |  |  |  |  |
Inventory [Line Items] |  |  |  |  |
Excess plant capacity and manufacturing variances cost incurred | 4,400,000 | $ 3,000,000 | 11,000,000 | $ 8,500,000 |
Bridgeport Fuel Cell, LLC [Member] |  |  |  |  |
Inventory [Line Items] |  |  |  |  |
Long-term inventory | $ 2,200,000 |  | $ 2,200,000 |  | $ 0

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- Definition Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(d)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Details
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