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Nature of Business and Basis of Presentation (Tables) | 12 Months Ended
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Oct. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Percent of customer consolidated revenues [Table Text Block] | The percent of consolidated revenues from each customer for the years ended October 31, 2016, 2015 and 2014, respectively, are presented below.
|  | 2016 |  | 2015 |  | 2014
POSCO Energy |  | 48 | % |  | 67 | % |  | 69 | %
The United Illuminating Company |  | 10 | % |  | 14 | % |  | 9 | %
Department of Energy |  | 8 | % |  | 5 | % |  | 4 | %
Dominion Bridgeport Fuel Cell, LLC |  | 6 | % |  | 3 | % |  | 3 | %
BioFuels Energy, LLC |  | 6 | % |  | — | % |  | — | %
Total |  | 78 | % |  | 89 | % |  | 85 | %

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