Benefit Plans	9 Months Ended
Jul. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Benefit Plans	Note 16. Benefit Plans 2018 Omnibus Incentive Plan The Company’s 2018 Omnibus Incentive Plan (the “2018 Incentive Plan”) was approved by the Company’s stockholders at the 2018 Annual Meeting of Stockholders, which was held on April 5, 2018. The 2018 Incentive Plan provides that a total of 4.0 million shares of the Company’s common stock may be issued thereunder. The 2018 Incentive Plan authorizes grants of stock options, stock appreciation rights, restricted stock awards (“RSAs”), restricted stock units (“RSUs”), performance shares, performance units and incentive awards to key employees, directors, consultants and advisors. The Company's 2006 and 2010 Equity Incentive Plans remain in effect only as they relate to awards previously made under those plans, which consist of incentive stock options, nonstatutory stock options, RSAs and RSUs. Restricted Stock Awards and Units A total of 2.4 million shares were granted as RSUs under the 2018 Incentive Plan during the nine months ended July 31, 2018. These RSUs were awarded to the Company’s executive officers and key employees. RSU expense is based on the fair value of the award at the date of grant and is amortized over the vesting period which is either over three or four years. There were 4.4 million RSUs and RSAs outstanding as of July 31, 2018 under the 2018 Incentive Plan and the Company’s previous incentive plans. Stock Awards During the nine months ended July 31, 2018, the Company awarded 158,708 shares of fully vested, unrestricted common stock to the independent members of our board of directors as a component of board of director compensation, which will result in recognition of $0.3 million of expense (recognized ratably over the next 12 months). Employee Stock Purchase Plan The 2018 Employee Stock Purchase Plan (the “ESPP”) was approved by the Company’s stockholders at the 2018 Annual Meeting of Stockholders. The adoption of the ESPP allows the Company to provide eligible employees of FuelCell Energy, Inc. and of certain designated subsidiaries with the opportunity to voluntarily participate in the ESPP, enabling such participants to purchase shares of the Company’s common stock at a discount to market price at the time of such purchase. The maximum number of the Company’s shares of common stock that may be issued under the ESPP is 500,000 shares.

Note 16. Benefit Plans

2018 Omnibus Incentive Plan

The Company’s 2018 Omnibus Incentive Plan (the “2018 Incentive Plan”) was approved by the Company’s stockholders at the 2018 Annual Meeting of Stockholders, which was held on April 5, 2018. The 2018 Incentive Plan provides that a total of 4.0 million shares of the Company’s common stock may be issued thereunder. The 2018 Incentive Plan authorizes grants of stock options, stock appreciation rights, restricted stock awards (“RSAs”), restricted stock units (“RSUs”), performance shares, performance units and incentive awards to key employees, directors, consultants and advisors. The Company's 2006 and 2010 Equity Incentive Plans remain in effect only as they relate to awards previously made under those plans, which consist of incentive stock options, nonstatutory stock options, RSAs and RSUs.

Restricted Stock Awards and Units

A total of 2.4 million shares were granted as RSUs under the 2018 Incentive Plan during the nine months ended July 31, 2018. These RSUs were awarded to the Company’s executive officers and key employees. RSU expense is based on the fair value of the award at the date of grant and is amortized over the vesting period which is either over three or four years. There were 4.4 million RSUs and RSAs outstanding as of July 31, 2018 under the 2018 Incentive Plan and the Company’s previous incentive plans.

Stock Awards

During the nine months ended July 31, 2018, the Company awarded 158,708 shares of fully vested, unrestricted common stock to the independent members of our board of directors as a component of board of director compensation, which will result in recognition of $0.3 million of expense (recognized ratably over the next 12 months).

Employee Stock Purchase Plan

The 2018 Employee Stock Purchase Plan (the “ESPP”) was approved by the Company’s stockholders at the 2018 Annual Meeting of Stockholders. The adoption of the ESPP allows the Company to provide eligible employees of FuelCell Energy, Inc. and of certain designated subsidiaries with the opportunity to voluntarily participate in the ESPP, enabling such participants to purchase shares of the Company’s common stock at a discount to market price at the time of such purchase. The maximum number of the Company’s shares of common stock that may be issued under the ESPP is 500,000 shares.