XML 122 R74.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Debt - Additional Information (Details)										1 Months Ended				12 Months Ended
	Dec. 17, 2019	Nov. 22, 2019 USD ($) $ / shares shares	Sep. 30, 2019 USD ($)	May 09, 2019 USD ($)	Mar. 29, 2019 USD ($)	Feb. 28, 2019 USD ($) MW	Jan. 09, 2019 USD ($)	Dec. 21, 2018 USD ($) MW	Dec. 13, 2018 USD ($) MW	Oct. 31, 2019 USD ($) $ / shares MW shares	Apr. 30, 2019 USD ($)	Jan. 31, 2019 USD ($) Employee Position	Oct. 31, 2015 USD ($) Position	Oct. 31, 2019 USD ($) $ / shares MW shares	Oct. 31, 2018 USD ($)	Oct. 31, 2017 USD ($)	Apr. 01, 2020 USD ($)	Oct. 21, 2019 USD ($)	Aug. 12, 2019 USD ($)	May 16, 2019	May 08, 2019	Oct. 01, 2018 USD ($)	Nov. 30, 2016 USD ($)	Apr. 30, 2016 USD ($)
Debt Instrument [Line Items]
Long-term line of credit, discount										$ 4,251,000				$ 4,251,000
Class of warrants or rights issued value														3,900
Interest expense														$ 10,623,000	$ 9,055,000	$ 9,171,000
Lease payment term										36 months				36 months
Connecticut Green Bank Loans [Member]
Debt Instrument [Line Items]
Long-term line of credit										$ 1,800,000				$ 1,800,000
Line of credit facility, maximum borrowing capacity										3,000,000				3,000,000
Fifth Third Bank Groton Loan [Member]
Debt Instrument [Line Items]
Debt instrument, total notional value																		$ 18,000,000	$ 23,000,000
Connecticut Development Authority Note [Member]
Debt Instrument [Line Items]
Collateralized agreements										$ 4,000,000				$ 4,000,000
Debt instrument, interest rate										5.00%				5.00%
Long-term line of credit															284,000
Orion Energy Partners Investment Agent, LLC Credit Facility [Member]
Debt Instrument [Line Items]
Percentage of aggregate principal amount on discount														2.50%
Percentage of cash interest paid														9.90%
Percentage of paid in kind interest														2.05%
Class of warrants or rights issued value														$ 3,900,000
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Percentage of premium prepaid amount														30.00%
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Groton Project [Member]
Debt Instrument [Line Items]
Capacity of plant | MW										7.4
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | LIPA Yaphank Solid Waste Management Project [Member]
Debt Instrument [Line Items]
Capacity of plant | MW										7.4
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Drew down to fully repay debt outstanding		$ 80,000,000
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Long-term line of credit										$ 200,000,000				$ 200,000,000
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Initial Funding [Member]
Debt Instrument [Line Items]
Drew down to fully repay debt outstanding														14,500,000
Long-term line of credit after discount										14,100				14,100
Long-term line of credit, discount										$ 400,000				$ 400,000
Debt instrument term														7 years
Line of credit facility, expiration period														8 years
Quarterly payment payable date														Oct. 31, 2027
Debt instrument, description														Outstanding principal on the Orion Facility will be amortized on a straight-line basis over a seven year term in quarterly payments beginning one year after the Initial Funding; provided that, if the Company does not have sufficient cash on hand to make any required quarterly amortization payments, such amounts shall be deferred and payable at such time as sufficient cash is available to make such payments subject to all outstanding principal being due and payable on the maturity date, which is the date that is eight years after the closing date or October 31, 2027.
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Initial Funding Warrants [Member]
Debt Instrument [Line Items]
Class of warrants or rights issued | shares										6,000,000				6,000,000
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding Warrants [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Class of warrants or rights issued | shares		14,000,000
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member]
Debt Instrument [Line Items]
Drew down to fully repay debt outstanding														$ 65,500,000
Long-term line of credit after discount										$ 63,900,000				63,900,000
Long-term line of credit, discount										$ 1,600,000				$ 1,600,000
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member] | Exercise Price 0.242 [Member]
Debt Instrument [Line Items]
Class of warrants or rights exercised | shares										8,000,000				8,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 0.242				$ 0.242
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member] | Exercise Price 0.620 [Member]
Debt Instrument [Line Items]
Class of warrants or rights exercised | shares										6,000,000				6,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 0.620				$ 0.620
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member] | Maximum [Member]
Debt Instrument [Line Items]
Class of warrants or rights issued | shares										14,000,000				14,000,000
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member] | Groton Project [Member]
Debt Instrument [Line Items]
Capacity of plant | MW														7.4
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member] | LIPA Yaphank Solid Waste Management Project [Member]
Debt Instrument [Line Items]
Capacity of plant | MW														7.4
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member] | Tulare BioMAT [Member]
Debt Instrument [Line Items]
Capacity of plant | MW														2.8
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Drew down to fully repay debt outstanding		$ 65,500,000
Long-term line of credit, discount		$ 1,600,000
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member] | Subsequent Event [Member] | Exercise Price 0.242 [Member]
Debt Instrument [Line Items]
Class of warrants or rights issued | shares		8,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares		$ 0.242
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member] | Subsequent Event [Member] | Exercise Price 0.620 [Member]
Debt Instrument [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares		$ 0.620
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Second Funding [Member] | Subsequent Event [Member] | Maximum [Member]
Debt Instrument [Line Items]
Class of warrants or rights issued | shares		14,000,000
Orion Energy Partners Investment Agent, LLC Credit Facility [Member] | Remainder of Funding [Member]
Debt Instrument [Line Items]
Line of credit receivable amount										$ 120,000,000				$ 120,000,000
Connecticut Green Bank Note [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate																					5.00%
Connecticut Green Bank Note [Member] | Connecticut Green Bank Loans [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity															5,900,000
Subordinated Credit Agreement [Member] | Connecticut Green Bank Loans [Member] | Bridgeport Fuel Cell, LLC [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate				8.00%
Long-term line of credit										5,800,000				$ 5,800,000
Debt instrument term				7 years
Proceeds from long-term lines of credit				$ 6,000,000
Debt service coverage ratio				110.00%
Debt instrument, covenant terms														On May 9, 2019, in connection with the closing of the purchase of BFC, BFC entered into a subordinated credit agreement with the Connecticut Green Bank whereby Connecticut Green Bank provided financing in the amount of $6.0 million (the “Subordinated Credit Agreement”). As security for the Subordinated Credit Agreement, Connecticut Green Bank received a perfected lien, subordinated and second in priority to the liens securing the $25.0 million loaned under the BFC Credit Agreement (as defined below), in all of the same collateral securing the BFC Credit Agreement. The interest rate under the Subordinated Credit Agreement is 8% per annum. The debt service coverage ratio required to be maintained under the Subordinated Credit Agreement may not be less than 1.10 as of the end of each fiscal quarter, beginning with the quarter ended July 31, 2020. The term of the Subordinated Credit Agreement expires 7 years from the date of the advance of the loan. Principal and interest are due monthly in amounts sufficient to fully amortize the loan over an 84 month period ending in May 2026. The Subordinated Credit Agreement contains representations, warranties and other covenants. The balance under the Subordinated Credit Agreement as of October 31, 2019 was $5.8 million.
Subordinated Credit Agreement [Member] | Senior Term Loan [Member] | Connecticut Green Bank Loans [Member] | Bridgeport Fuel Cell, LLC [Member]
Debt Instrument [Line Items]
Liens securing senior term loan amount				$ 25,000,000
Credit Agreement [Member] | Bridgeport Fuel Cell, LLC [Member]
Debt Instrument [Line Items]
Debt instrument, total notional value				$ 25,000,000
Credit Agreement [Member] | Bridgeport Loans [Member]
Debt Instrument [Line Items]
Maturity date				May 09, 2025
Debt instrument, interest rate basis term				30 days
Interest rate description														The interest rate under the BFC Credit Agreement fluctuates monthly at the 30-day LIBOR rate plus 275 basis points
Credit Agreement [Member] | Bridgeport Loans [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Net interest rate																				5.09%
Credit Agreement [Member] | Bridgeport Loans [Member] | Level Adjustments [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Fair value adjustments														$ 600,000
Credit Agreement [Member] | Bridgeport Loans [Member] | Bridgeport Fuel Cell, LLC [Member]
Debt Instrument [Line Items]
Debt instrument, covenant terms														The BFC Credit Agreement requires BFC to maintain a debt service reserve at each of Liberty Bank and Fifth Third Bank of $1.25 million, which debt service reserves were funded on May 10, 2019, to be held in deposit accounts at each respective bank, with funds to be disbursed with the consent of or at the request of the required lenders in their sole discretion. Each of Liberty Bank and Fifth Third Bank also has an operation and module replacement reserve (“O&M Reserve”) of $250,000, both of which were funded at closing of the BFC Credit Agreement, to be held in deposit accounts at each respective bank, and thereafter BFC is required to deposit $100,000 per month into each O&M Reserve for the first five years of the BFC Credit Agreement, with such funds to be released at the sole discretion of Liberty Bank and Fifth Third Bank, as applicable. BFC is also required to maintain excess cash flow reserve accounts at each of Liberty Bank and Fifth Third Bank and to evenly split and deposit the excess cash flows from the Bridgeport Fuel Cell Project into these accounts. Excess cash flow consists of cash generated by BFC from the Bridgeport Fuel Cell Project after payment of all expenses (including after payment of intercompany service fees to the Company), debt service to Liberty Bank and Fifth Third Bank, the funding of all required reserves, and payments to Connecticut Green Bank for the subordinated facility. BFC is also required to maintain a debt service coverage ratio of not less than 1.20, measured for the trailing year based on fiscal quarters beginning with the quarter ended July 31, 2020. The BFC Credit Agreement contains representations, warranties and other covenants. The Company also has certain quarterly and annual financial reporting requirements under the BFC Credit Agreement. The annual financial statements to be provided pursuant to such requirements are to be audited and accompanied by a report of an independent certified public accountant, which report shall not include a “going concern” matter of emphasis or any qualification or exception as to the scope of such audit.
Credit Agreement [Member] | Bridgeport Loans [Member] | Bridgeport Fuel Cell, LLC [Member] | Fifth Third Bank [Member]
Debt Instrument [Line Items]
Proceeds from long-term lines of credit				$ 12,500,000
Debt service reserves required to be maintained and held in deposit accounts										1,250,000				$ 1,250,000
Operation and module replacement reserves required to be maintained and held in deposit accounts										250,000				250,000
Operation and module replacement reserve to be deposited per month										100,000				100,000
Credit Agreement [Member] | Bridgeport Loans [Member] | Bridgeport Fuel Cell, LLC [Member] | Liberty Bank [Member]
Debt Instrument [Line Items]
Proceeds from long-term lines of credit				$ 12,500,000
Debt service reserves required to be maintained and held in deposit accounts										1,250,000				1,250,000
Operation and module replacement reserves required to be maintained and held in deposit accounts										250,000				250,000
Operation and module replacement reserve to be deposited per month										100,000				$ 100,000
Credit Agreement [Member] | Minimum [Member] | Bridgeport Loans [Member] | Bridgeport Fuel Cell, LLC [Member]
Debt Instrument [Line Items]
Debt service coverage ratio														120.00%
Finance Obligations for Sale Leaseback Agreements [Member] | PNC Energy Capital, LLC [Member]
Debt Instrument [Line Items]
Long-term line of credit										45,200,000				$ 45,200,000	46,100,000
State of Connecticut [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate													2.00%
Debt instrument term													15 years
Debt instrument, total notional value										10,000,000			$ 10,000,000	$ 10,000,000	10,000,000
Debt instrument, payment terms, period principal payments are deferred													4 years
Debt instrument, date of first required payment													Dec. 01, 2019
Loan forgiveness terms														if the Company created 165 full-time positions and retained 538 full-time positions for two consecutive years (the “Employment Obligation”) as measured on October 28, 2017 (the “Target Date”). The Assistance Agreement contains representations, warranties and other covenants. The Assistance Agreement was subsequently amended in April 2017 to extend the Target Date by two years to October 28, 2019.
State of Connecticut [Member] | Employment Obligation [Member]
Debt Instrument [Line Items]
Number of full time positions required to be created | Position													165
Number of full time positions required to be retained | Position													538
State of Connecticut [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, forgiveness														$ 5,000,000
State of Connecticut [Member] | Second Amendment [Member] | Employment Obligation [Member]
Debt Instrument [Line Items]
Number of minimum full time positions required to be maintained | Employee												538
Number of consecutive months maintain the full time positions												24 months
Additional number of full time positions required to be create | Position												91
Additional credits to be earned												$ 2,000,000
Target date of job audit												90 days
Principal payment number of employee under employee obligation target												$ 18,587.36
Hercules Loan and Security Agreement [Member]
Debt Instrument [Line Items]
Long-term line of credit															25,343,000
Hercules Loan and Security Agreement [Member] | Hercules Loan [Member]
Debt Instrument [Line Items]
Debt instrument term														30 months
Line of credit facility, maximum borrowing capacity																								$ 25,000,000
Debt instrument, interest rate, stated percentage rate range														9.90%
Interest rate, basis points														4.50%
Other Deductions and Charges																						$ 1,700,000
Final principal payments on term loans			$ 800,000
Hercules Loan and Security Agreement [Member] | Hercules Loan [Member] | Scenario Forecast [Member]
Debt Instrument [Line Items]
Other Deductions and Charges																	$ 900,000
Webster Bank Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage rate range														5.00%
Notes payable to bank, current										500,000				$ 500,000	$ 1,100,000								$ 2,300,000
Enhanced Capital Loan and Security Agreement [Member]
Debt Instrument [Line Items]
Long-term line of credit										1,500,000				$ 1,500,000
Line of credit facility, maximum borrowing capacity							$ 1,500,000
Interest rate, basis points							6.00%
Debt instrument, maturity period description														The loan maturity date was three years from the date of the Enhanced Capital Loan Agreement, upon which the outstanding principal and any accrued interest would be due and payable.
Debt instrument, maturity period							3 years
New Construction Loan Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 23,000,000
Loan advance						9,700,000					$ 1,400,000
Total outstanding balance						11,100,000
New Construction Loan Facility [Member] | Fifth Third Bank Groton Loan [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						23,000,000
Loan advance						$ 9,700,000					$ 1,400,000
Total outstanding balance										11,100,000				$ 11,100,000
New Construction Loan Facility [Member] | Fifth Third Bank Groton Loan [Member] | Groton CT [Member]
Debt Instrument [Line Items]
Capacity of plant | MW						7.4
Groton Agreement | Fifth Third Bank Groton Loan [Member]
Debt Instrument [Line Items]
Fees payment						$ 15,000
Groton Agreement | Fifth Third Bank Groton Loan [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Interest rate, basis points	6.00%	4.00%
NRG Energy, Inc. [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity										$ 40,000,000				$ 40,000,000
Interest expense					$ 750,000
NRG Energy, Inc. [Member] | Central CA Fuel Cell 2, LLC [Member]
Debt Instrument [Line Items]
Loan advance									$ 5,800,000
NRG Energy, Inc. [Member] | Tulare BioMAT [Member] | California [Member]
Debt Instrument [Line Items]
Capacity of plant | MW									2.8
NRG Energy, Inc. [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage rate range														8.50%
NRG Energy, Inc. [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage rate range														8.00%
Optional project financing term														5 years
Generate Lending Construction Loan Agreement [Member] | Generate Lending, LLC [Member] | FuelCell Energy Finance II, LLC [Member]
Debt Instrument [Line Items]
Interest rate, basis points								9.50%
Loan advance								$ 10,000,000
Availability period for working capital loans								36 months
Generate Lending Construction Loan Agreement [Member] | Maximum [Member] | Generate Lending, LLC [Member] | FuelCell Energy Finance II, LLC [Member]
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity								$ 100,000,000
Generate Lending Construction Loan Agreement [Member] | Bolthouse Farms [Member] | Generate Lending, LLC [Member] | California [Member] | FuelCell Energy Finance II, LLC [Member]
Debt Instrument [Line Items]
Capacity of plant | MW								5
PNC Energy Capital, LLC [Member]
Debt Instrument [Line Items]
Debt instrument term														10 years
Orion Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument term														8 years
Bridgeport Fuel Cell, LLC [Member]
Debt Instrument [Line Items]
Debt instrument term														8 years

X

- Definition

Additional credits to be earned under assistance agreement.

+ References

No definition available.

+ Details

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

X

- Definition

Additional number of full time positions required to be create.

+ References

No definition available.

+ Details

Name:	fcel_AdditionalNumberOfFullTimePositionsRequiredToBeCreate
Namespace Prefix:	fcel_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Availability period for working capital loans.

+ References

No definition available.

+ Details

Name:	fcel_AvailabilityPeriodForWorkingCapitalLoans
Namespace Prefix:	fcel_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Capacity of plant.

+ References

No definition available.

+ Details

Name:	fcel_CapacityOfPlant
Namespace Prefix:	fcel_
Data Type:	num:powerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Class of warrants or rights exercised.

+ References

No definition available.

+ Details

Name:	fcel_ClassOfWarrantsOrRightsExercised
Namespace Prefix:	fcel_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Class of warrants or rights issued.

+ References

No definition available.

+ Details

Name:	fcel_ClassOfWarrantsOrRightsIssued
Namespace Prefix:	fcel_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Class of warrants or rights issued value.

+ References

No definition available.

+ Details

Name:	fcel_ClassOfWarrantsOrRightsIssuedValue
Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Consecutive term for full time positions.

+ References

No definition available.

+ Details

Name:	fcel_ConsecutiveTermForFullTimePositions
Namespace Prefix:	fcel_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt instrument, interest rate basis term.

+ References

No definition available.

+ Details

Name:	fcel_DebtInstrumentInterestRateBasisTerm
Namespace Prefix:	fcel_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt instrument maturity period.

+ References

No definition available.

+ Details

Name:	fcel_DebtInstrumentMaturityPeriod
Namespace Prefix:	fcel_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt instrument, payment terms, period principal payments are deferred.

+ References

No definition available.

+ Details

Name:	fcel_DebtInstrumentPaymentTermsPeriodPrincipalPaymentsAreDeferred
Namespace Prefix:	fcel_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt service coverage ratio.

+ References

No definition available.

+ Details

Name:	fcel_DebtServiceCoverageRatio
Namespace Prefix:	fcel_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt service reserves required to be maintained and held in deposit accounts.

+ References

No definition available.

+ Details

Name:	fcel_DebtServiceReservesRequiredToBeMaintainedAndHeldInDepositAccounts
Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line of credit receivable amount.

+ References

No definition available.

+ Details

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

X

- Definition

Loan Advance

+ References

No definition available.

+ Details

Name:	fcel_LoanAdvance
Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Loan forgiveness terms.

+ References

No definition available.

+ Details

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

X

- Definition

Number of full time positions required to be created.

+ References

No definition available.

+ Details

Name:	fcel_NumberOfFullTimePositionsRequiredToBeCreated
Namespace Prefix:	fcel_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of full time positions required to be retained.

+ References

No definition available.

+ Details

Name:	fcel_NumberOfFullTimePositionsRequiredToBeRetained
Namespace Prefix:	fcel_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of minimum full time positions required to be maintain.

+ References

No definition available.

+ Details

Name:	fcel_NumberOfMinimumFullTimePositionsRequiredToBeMaintain
Namespace Prefix:	fcel_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Operation and module replacement reserve to be deposited per month.

+ References

No definition available.

+ Details

Name:	fcel_OperationAndModuleReplacementReserveToBeDepositedPerMonth
Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Operation and module replacement reserves required to be maintained and held in deposit accounts.

+ References

No definition available.

+ Details

Name:	fcel_OperationAndModuleReplacementReservesRequiredToBeMaintainedAndHeldInDepositAccounts
Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Optional project financing term.

+ References

No definition available.

+ Details

Name:	fcel_OptionalProjectFinancingTerm
Namespace Prefix:	fcel_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of cash interest paid.

+ References

No definition available.

+ Details

Name:	fcel_PercentageOfCashInterestPaid
Namespace Prefix:	fcel_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of paid in kind interest.

+ References

No definition available.

+ Details

Name:	fcel_PercentageOfPaidInKindInterest
Namespace Prefix:	fcel_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of premium prepaid amount.

+ References

No definition available.

+ Details

Name:	fcel_PercentageOfPremiumPrepaidAmount
Namespace Prefix:	fcel_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Principal payable number of employee under employee obligation target.

+ References

No definition available.

+ Details

Name:	fcel_PrincipalPayableNumberOfEmployeeUnderEmployeeObligationTarget
Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Target date of job audit.

+ References

No definition available.

+ Details

Name:	fcel_TargetDateOfJobAudit
Namespace Prefix:	fcel_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The total of collateralized agreements including securities purchased under agreements to resell (repos), borrowed securities, and secured demand notes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(m)(2)(i)(A))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 10
-Section 05
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=109246787&loc=d3e93640-111703

+ Details

Name:	us-gaap_CollateralizedAgreements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentCovenantDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.

+ 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 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentDateOfFirstRequiredPayment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Decrease for amounts of indebtedness forgiven by the holder of the debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_DebtInstrumentDecreaseForgiveness
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Identification of the lender and information about a contractual promise to repay a short-term or long-term obligation, which includes borrowings under lines of credit, notes payable, commercial paper, bonds payable, debentures, and other contractual obligations for payment. This may include rationale for entering into the arrangement, significant terms of the arrangement, which may include amount, repayment terms, priority, collateral required, debt covenants, borrowing capacity, call features, participation rights, conversion provisions, sinking-fund requirements, voting rights, basis for conversion if convertible and remarketing provisions. The description may be provided for individual debt instruments, rational groupings of debt instruments, or by debt in total.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 6: 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(19))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

+ 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 210.5-02.22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentFeeAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

+ 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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateTerms
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ 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 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentMaturityDateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of gain (loss) included in earnings for the period from the increase (decrease) in fair value of interest rate derivatives not designated as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

+ Details

Name:	us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (210.5-03(11))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.9)
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

+ Details

Name:	us-gaap_InterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeFinanceLeaseTermOfContract1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of the required periodic payment applied to principal.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Current portion of the total carrying amount as of the balance sheet date due within one year or the operating cycle, if longer, on all notes payable to banks paid on an installment with long term maturities. This can include the amount of any loans from the applicant firm. This does not, however, include any mortgage balances.

+ 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 210.5-02.19(a)(1),20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_NotesPayableToBankCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of cash outflow for fees classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585

+ Details

Name:	us-gaap_PaymentsForFees
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ProceedsFromLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromLongTermLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets.

+ 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 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_SecuredLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=fcel_ConnecticutGreenBankLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=fcel_FifthThirdBankGrotonLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_ConnecticutDevelopmentAuthorityNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_OrionEnergyPartnersInvestmentAgentLLCCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=fcel_GrotonProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=fcel_LIPAYaphankSolidWasteManagementProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=fcel_SeniorSecuredCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=fcel_InitialFundingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=fcel_InitialFundingWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=fcel_SecondFundingWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=fcel_SecondFundingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=fcel_ExercisePriceZeroPointTwoFourTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=fcel_ExercisePriceZeroPointSixTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=fcel_TulareBioMATMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=fcel_RemainderOfFundingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_ConnecticutGreenBankNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_SubordinatedCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=fcel_BridgeportFuelCellLimitedLiabilityCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=fcel_SeniorTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_CreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=fcel_BridgeportLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=fcel_FifthThirdBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=fcel_LibertyBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_FinanceObligationsForSaleLeaseBackAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=fcel_PNCEnergyCapitalLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_StateOfConnecticutMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=fcel_EmploymentObligationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=fcel_SecondAmendmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_HerculesCapitalIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=fcel_HerculesLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_WebsterBankTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_EnhancedCapitalLoanAndSecurityAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_NewConstructionLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=fcel_GrotonCTMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_GrotonAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_NRGEnergyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=fcel_CentralCAFuelCell2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=fcel_TulareBioMATMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_GenerateLendingConstructionLoanAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=fcel_GenerateLendingLimitedLiabilityCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=fcel_FuelCellEnergyFinanceIIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=fcel_BolthouseFarmsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_PNCEnergyCapitalLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_OrionCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fcel_BridgeportFuelCellLimitedLiabilityCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: