XML 53 R50.htm IDEA: XBRL DOCUMENT
v3.19.2

Inventories - Components of Inventories (Parenthetical) (Details) - USD ($) $ in Millions | Jul. 31, 2019 | Oct. 31, 2018
--- | --- | ---
Inventory Disclosure [Abstract] |  |
Completed Standard Component | $ 23.4 | $ 19.0

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