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Debt and Leases (Details) ft² in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2016 | Nov. 30, 2015 | Oct. 31, 2016 USD ($) ft² transaction | Nov. 09, 2015 USD ($) | Oct. 31, 2015 USD ($) | Mar. 05, 2013 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |
Other Commitment, Due in Next Twelve Months |  |  | $ 5,275 |  |  |
Other Commitment, Due in Second Year |  |  | 26,530 |  |  |
Other Commitment, Due in Third Year |  |  | 3,426 |  |  |
Other Commitment, Due in Fourth Year |  |  | 3,954 |  |  |
Other Commitment, Due in Fifth Year |  |  | 3,743 |  |  |
Other Commitment, Due after Fifth Year |  |  | 40,250 |  |  |
Line of Credit Facility, Amount Outstanding |  |  | 0 |  | $ 2,945 |
Capital Lease Obligations |  |  | 660 |  | 726 |
Debt, Long-term and Short-term, Combined Amount |  |  | 83,178 |  | 16,303 |
Long-term Debt, Current Maturities |  |  | 5,275 |  | 7,358 |
Long-term Debt, Excluding Current Maturities |  |  | 77,903 |  | 8,945 |
Debt and Capital Leases, Future Minimum Payments Due |  |  | $ 83,178 |  |  |
Manufacturing facility [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Area of Real Estate Property | ft² |  |  | 65 |  |  |
Amount of Expected Increase in Real Estate Property | ft² |  |  | 102 |  |  |
Expected Area of Real Estate Property | ft² |  |  | 167 |  |  |
Hercules Capital, Inc. [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Term of loan |  |  | 30 months |  |  |
Other Deductions and Charges |  |  | $ 1,700 |  |  |
Increase in end of term charge |  |  | 2,100 |  |  |
Proceeds from Issuance of Debt |  |  | $ 15,000 |  |  |
Debt Instrument, Covenant Description |  |  | The loan contains a financial covenant whereby the Company is required to maintain an unrestricted cash balance of at least (a) 75% of the outstanding Loan balance plus (b) the amount of accounts payable (as defined under GAAP) not paid within 90 days of the date payment was issued. |  |  |
Debt Instrument, Interest Rate During Period |  |  | 9.50% |  |  |
Line of Credit Facility, Amount Outstanding |  |  | $ 20,521 |  | 0 |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 25,000 |  |  |
PNC Energy Capital, LLC [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Number of Sales-Leaseback Transactions Completed | transaction |  |  | 3 |  |  |
Line of Credit Facility, Amount Outstanding |  |  | $ 41,603 |  | 0 |
State of Connecticut [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Term of loan |  |  | 15 years |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 2.00% |  |  |
Connecticut Development Authority Note [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 4,000 |  |  |
Line of Credit Facility, Amount Outstanding |  |  | $ 2,589 |  | 2,817 |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 5.00% |  |  |
Connecticut Clean Energy Fund [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Term |  |  | 48 months |  |  |
Debt Instrument, Deferment Period |  |  | 8 years |  |  |
Line of Credit Facility, Amount Outstanding |  |  | $ 6,050 |  | 6,052 |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 5,900
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  | 5.00%
NRG Energy [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Term of loan |  |  | 5 years |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 40,000 |  |  |
CT Dept of Economic & Community Development [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 10,000 |  |
NRG Energy, Inc. [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of Credit Facility, Amount Outstanding |  |  | 1,755 |  | 3,763 |
First Tranche [Member] | Hercules Capital, Inc. [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Loan Advance |  |  | 5,000 |  |  |
Loan and security agreement [Member] | Hercules Capital, Inc. [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Term | 30 months |  |  |  |  |
Second Tranche [Member] | Hercules Capital, Inc. [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Loan Advance |  |  | 5,000 |  |  |
CT Dept of Economic & Community Development [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 10,000 |  | $ 0 |
Debt Instrument, Deferment Period |  | 4 years |  |  |  |
Minimum [Member] | NRG Energy [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Interest Rate During Period |  |  | 8.00% |  |  |
Maximum [Member] | NRG Energy [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Interest Rate During Period |  |  | 8.50% |  |  |

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