XML 60 R48.htm IDEA: XBRL DOCUMENT
v3.20.4

Inventories - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jan. 31, 2021 | Jan. 31, 2020
Costs of Revenues [Member] |  |
Inventory [Line Items] |  |
Excess plant capacity and manufacturing variances cost incurred | $ 2.0 | $ 1.7

X
- Definition Excess plant capacity and manufacturing variances cost. + References No definition available. + Details
Name: | fcel_ExcessPlantCapacityAndManufacturingVariancesCost
Namespace Prefix: | fcel_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_InventoryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |