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Nature of Business, Basis of Presentation and Significant Accounting Policies - Percent of Customer Consolidated Revenues (Details) - Sales Revenue Net [Member] - Customer Concentration Risk [Member]	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Concentration Risk [Line Items]
Significant customer revenue percentage	78.00%	75.00%	90.00%
Hanyang Industrial Development Co., LTD [Member]
Concentration Risk [Line Items]
Significant customer revenue percentage	40.00%	0.00%	0.00%
POSCO Energy [Member]
Concentration Risk [Line Items]
Significant customer revenue percentage	6.00%	48.00%	67.00%
Department of Energy [Member]
Concentration Risk [Line Items]
Significant customer revenue percentage	9.00%	8.00%	5.00%
Dominion Bridgeport FuelCell Park [Member]
Concentration Risk [Line Items]
Significant customer revenue percentage	11.00%	6.00%	3.00%
ExxonMobil [Member]
Concentration Risk [Line Items]
Significant customer revenue percentage	9.00%	3.00%	1.00%
Avangrid Holdings (through its various subsidiaries) [Member]
Concentration Risk [Line Items]
Significant customer revenue percentage	3.00%	10.00%	14.00%

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
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