XML 76 R56.htm IDEA: XBRL DOCUMENT
v3.19.2

Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2019 | Feb. 21, 2019 | Jun. 13, 2018 | May 03, 2017 | Apr. 30, 2019 | Jan. 31, 2019 | Apr. 30, 2019 | Oct. 31, 2018
Stockholders' Equity Note |  |  |  |  |  |  |  |
Stock issued during period value, new issues |  |  |  |  |  | $ 90 |  |
Exchange Agreement [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Common stock issued to warrant holders |  | 500,000 |  |  |  |  |  |
Series C Warrants [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding | 964,114 |  |  |  | 964,114 |  | 964,114 | 964,114
Series A Warrants [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 69.96 |  |  |  | $ 69.96 |  | $ 69.96 |
Class of Warrant or Right, Outstanding | 640,000 |  |  |  | 640,000 |  | 640,000 |
Series A Warrant [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding |  |  |  |  |  |  |  | 640,000
Fair value of the warrant pre-modification |  |  |  |  | $ 3,169 |  | $ 3,169 |
Series A Warrant [Member] | Exchange Agreement [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Fair value of the warrant pre-modification |  |  |  |  | 300 |  | 300 |
Fair value of the shares at the date of the Exchange Agreement |  |  |  |  | $ 3,500 |  | $ 3,500 |
Common Stock [Member] | Series C Warrants [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  |  |  |  |  |  | 0 |
Common Stock [Member] | Series D Warrants [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  |  |  |  |  |  | 0 |
At Market Issuance Sales Agreement [Member] | B. Riley FBR, Inc and Oppenheimer & Co. Inc. [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Percentage of sales commission |  |  | 3.00% |  |  |  |  |
At Market Issuance Sales Agreement [Member] | Maximum [Member] | B. Riley FBR, Inc and Oppenheimer & Co. Inc. [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Aggregate offering price |  |  | $ 50,000 |  |  |  |  |
At Market Issuance Sales Agreement [Member] | Common Stock [Member] | B. Riley FBR, Inc and Oppenheimer & Co. Inc. [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  |  |  |  |  |  | 0 |
Stock issued during period value, new issues | $ 8,000 |  |  |  |  |  |  |
At Market Issuance Sales Agreement [Member] | Common Stock [Member] | Maximum [Member] | B. Riley FBR, Inc and Oppenheimer & Co. Inc. [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Stock to be sold in future during period value new issues | $ 42,000 |  |  |  |  |  |  |
Underwritten Public Offering [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues |  |  |  | 1,000,000 |  |  |  |
Underwritten Public Offering [Member] | Series C Warrants [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Class of warrants or rights issued |  |  |  | 1,000,000 |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  |  | $ 19.20 |  |  |  |
Class of warrant or right term |  |  |  | 5 years |  |  |  |
Underwritten Public Offering [Member] | Series D Warrants [Member] |  |  |  |  |  |  |  |
Stockholders' Equity Note |  |  |  |  |  |  |  |
Class of warrants or rights issued |  |  |  | 1,000,000 |  |  |  |

X
- Definition Aggregate offering price. + References No definition available. + Details
Name: | fcel_AggregateOfferingPrice
Namespace Prefix: | fcel_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Class of warrant or right term of warrants or rights. + References No definition available. + Details
Name: | fcel_ClassOfWarrantOrRightTermOfWarrantsOrRights
Namespace Prefix: | fcel_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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 Common stock shares issued to warrant holders. + References No definition available. + Details
Name: | fcel_CommonStockSharesIssuedToWarrantHolders
Namespace Prefix: | fcel_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of sales commission. + References No definition available. + Details
Name: | fcel_PercentageOfSalesCommission
Namespace Prefix: | fcel_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stock to be sold in future during period value new issues. + References No definition available. + Details
Name: | fcel_StockToBeSoldInFutureDuringPeriodValueNewIssues
Namespace Prefix: | fcel_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Adjustment for noncash service expenses paid for by granting of warrants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_AdjustmentOfWarrantsGrantedForServices
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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 Number 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)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 25 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875 + Details
Name: | us-gaap_FairValueAdjustmentOfWarrants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of new stock issued during the period. + 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(29)) -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 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 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(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 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(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 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(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodValueNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | fcel_AgreementTypeAxis=fcel_ExchangeAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=fcel_SeriesCWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=fcel_SeriesAWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=fcel_SeriesAWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=fcel_SeriesDWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=fcel_AtMarketIssuanceSalesAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=fcel_BRileyFBRIncAndOppenheimerCoIncMember
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_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |