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Debt and Finance Obligation (Tables)
 3 Months Ended
Jan. 31, 2017
Debt [Abstract]  
Schedule of Debt [Table Text Block]
Debt as of January 31, 2017 and October 31, 2016, consisted of the following:
 
 
January 31, 2017
 
October 31, 2016
Connecticut Development Authority Note
 
$
2,530

 
$
2,589

CT Green Bank Note
 
6,052

 
6,050

NRG Energy, Inc. Loan Agreement
 
—

 
1,755

PNC Energy Capital, LLC Finance Obligation
 
47,252

 
41,603

State of Connecticut Loan
 
10,000

 
10,000

Hercules Loan and Security Agreement
 
20,760

 
20,521

New Britain Renewable Energy Term Loan
 
2,140

 
—

Capitalized lease obligations
 
774

 
660

Deferred finance costs
 
(1,459
)
 
(1,408
)
Total debt
 
$
88,049

 
$
81,770

Current portion of long-term debt and finance obligation
 
(9,428
)
 
(5,010
)
Long-term debt
 
$
78,621

 
$
76,760