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Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2015
Debt Instrument [Line Items]
Capitalized lease obligations	$ 141	$ 341
Deferred finance costs	(3,180)	(1,311)
Unamortized debt discount	(4,251)
Total debt	106,317	87,878
Current portion of long-term debt	(21,916)	(17,596)
Long-term debt	84,401	70,282
Connecticut Development Authority Note [Member]
Debt Instrument [Line Items]
Long-term Line of Credit		284
Orion Energy Partners Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	14,500
Connecticut Green Bank Loan [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	7,555	6,052
Liberty Bank Term Loan Agreement (BFC Loan) [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	11,632
Fifth Third Bank Term Loan Agreement (BFC Loan) [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	11,632
Finance Obligations for Sale-Lease Back Transactions [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	45,219	46,062
State of Connecticut Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	10,000	10,000	$ 10,000
Hercules Loan and Security Agreement [Member]
Debt Instrument [Line Items]
Long-term Line of Credit		25,343
New Britain Renewable Energy Term Loan [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	497	$ 1,107
Enhanced Capital Loan and Security Agreement [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	1,500
Fifth Third Bank Construction Loan Agreement [Member]
Debt Instrument [Line Items]
Long-term Line of Credit	$ 11,072