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Debt and Financing Obligation - Schedule of Debt (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Oct. 31, 2017	Nov. 30, 2015
Debt Instrument [Line Items]
Equipment financing and capital lease obligations	$ 594	$ 632
Deferred finance costs	(1,272)	(1,344)
Total debt	82,525	87,791
Current portion of long-term debt and financing obligation	(23,513)	(28,281)
Long-term debt	59,012	59,510
Connecticut Development Authority Note [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	2,287	2,349
Connecticut Green Bank Note [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	6,052	6,052
Financing Obligation for Sale-Lease Back Transactions [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	46,550	46,937
State of Connecticut Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	10,000	10,000	$ 10,000
Hercules Capital, Inc. [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	16,764	21,468
New Britain Renewable Energy Term Loan [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	$ 1,550	$ 1,697