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Nature of Business, Basis of Presentation and Significant Accounting Policies (Tables)
 12 Months Ended
Oct. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]  
Percent of Customer Consolidated Revenues

The percent of consolidated revenues from each customer for the years ended October 31, 2017, 2016 and 2015, respectively, are presented below.

 

 

 

2017

 

 

2016

 

 

2015

 

Hanyang Industrial Development Co., LTD

 

 

40

%

 

 

—

%

 

 

—

%

Dominion Bridgeport Fuel Cell, LLC

 

 

11

%

 

 

6

%

 

 

3

%

Department of Energy

 

 

9

%

 

 

8

%

 

 

5

%

ExxonMobil

 

 

9

%

 

 

3

%

 

 

1

%

POSCO Energy

 

 

6

%

 

 

48

%

 

 

67

%

Avangrid Holdings (through its various subsidiaries)

 

 

3

%

 

 

10

%

 

 

14

%

Total

 

 

78

%

 

 

75

%

 

 

90

%