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Project assets (Details) - USD ($) $ in Thousands	Jul. 31, 2015	Oct. 31, 2014
Project assets [Abstract]
Project assets	$ 11,639	$ 784

X

- Definition

Project assets

+ References

No definition available.

+ Details

Name:	fcel_Projectassets
Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Project assets [Abstract]

+ References

No definition available.

+ Details

Name:	fcel_ProjectassetsAbstract
Namespace Prefix:	fcel_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration