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Loss Per Share (Tables) | 12 Months Ended
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Oct. 31, 2022
Loss Per Share |
Calculation of Basic and Diluted Loss Per Share | The calculation of basic and diluted EPS for the years ended October 31, 2022, 2021 and 2020 was as follows (amounts in thousands, except share and per share amounts): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended October 31, | ​
​ |  | 2022 | ​ | ​ | 2021 | 2020 |
Numerator | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net loss attributable to FuelCell Energy, Inc. | ​ | $ | (142,722) | ​ | ​ | (101,055) | ​ | $ | (89,107) | ​
Series B preferred stock dividends | ​ | ​ | (3,200) | ​ | ​ | (3,200) | ​ | ​ | (3,331) | ​
Net loss attributable to common stockholders | ​ | $ | (145,922) | ​ | $ | (104,255) | ​ | $ | (92,438) | ​
Denominator | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average common shares outstanding – basic | ​ | ​ | 383,139,140 | ​ | ​ | 334,742,346 | ​ | ​ | 221,960,288 | ​
Effect of dilutive securities (1) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​
Weighted average common shares outstanding – diluted | ​ | ​ | 383,139,140 | ​ | ​ | 334,742,346 | ​ | ​ | 221,960,288 | ​
Net loss to common stockholders per share – basic | ​ | $ | (0.38) | ​ | $ | (0.31) | ​ | $ | (0.42) | ​
Net loss to common stockholders per share – diluted (1) | ​ | $ | (0.38) | ​ | $ | (0.31) | ​ | $ | (0.42) | ​
(1) | Due to the net loss to common stockholders in each of the years presented above, diluted earnings per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. As of October 31, 2022, 2021 and 2020, potentially dilutive securities excluded from the diluted loss per share calculation are as follows:
Schedule of Potentially Dilutive Securities Excluded from the Diluted Loss Per Share Calculation | As of October 31, 2022, 2021 and 2020, potentially dilutive securities excluded from the diluted loss per share calculation are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | October 31, | ​ | October 31, | ​ | October 31,
​ |  | 2022 |  | 2021 | ​ | 2020
Orion Warrants | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 2,700,000
May 2017 Offering – Series C Warrants | ​ | ​ | - | ​ | ​ | 950,102 | ​ | ​ | 964,114
Outstanding options to purchase common stock | ​ | ​ | 20,231 | ​ | ​ | 22,388 | ​ | ​ | 23,891
Unvested Restricted Stock Awards | ​ | ​ | - | ​ | ​ | - | ​ | ​ | 538
Unvested Restricted Stock Units | ​ | ​ | 2,520,881 | ​ | ​ | 2,543,541 | ​ | ​ | 2,066,602
5% Series B Cumulative Convertible Perpetual Preferred Stock | ​ | ​ | 37,837 | ​ | ​ | 37,837 | ​ | ​ | 37,837
Total potentially dilutive securities | ​ | ​ | 2,578,949 | ​ | ​ | 3,553,868 | ​ | ​ | 5,792,982

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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