XML 53 R42.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Inventories - Components of Inventories (Parenthetical) (Details) - USD ($) $ in Millions | Jul. 31, 2017 | Oct. 31, 2016
--- | --- | ---
Inventory Disclosure [Abstract] |  |
Completed Standard Component | $ 40.1 | $ 40.6

X
- Definition Completed Standard Component + References No definition available. + Details
Name: | fcel_CompletedStandardComponent
Namespace Prefix: | fcel_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration