Debt (Details) - USD ($)
$ in Thousands |
3 Months Ended |
12 Months Ended |
|
Jan. 31, 2016 |
Oct. 31, 2015 |
Mar. 05, 2013 |
| Debt Instrument [Line Items] |
|
|
|
| Long-term Line of Credit |
$ 0
|
$ 2,945
|
|
| Letters of Credit Outstanding, Amount |
8,700
|
8,700
|
|
| Payments for (Proceeds from) Loans and Leases |
2,100
|
|
|
| Capital Lease Obligations |
704
|
726
|
|
| Long-term Debt, Current Maturities |
$ 1,957
|
7,358
|
|
| Debt Instrument, Term |
15 years
|
|
|
| Lease Payment Terms |
36 months
|
|
|
| PNC Energy Capital, LLC [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Proceeds from Loans |
$ 3,800
|
|
|
| Letters of Credit Outstanding, Amount |
6,826
|
0
|
|
| Proceeds received from sale of project assets |
8,800
|
|
|
| Lease Agreements for Projects |
30,000
|
|
|
| State of Connecticut [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Long-term Construction Loan, Noncurrent |
$ 10,000
|
$ 0
|
|
| Debt Instrument, Interest Rate, Stated Percentage |
2.00%
|
|
|
| NRG Energy [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Line of Credit Facility, Maximum Borrowing Capacity |
$ 40,000
|
|
|
| Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum |
|
8.50%
|
|
| Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum |
|
8.00%
|
|
| JPMorgan Chase Revolver [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Line of Credit Facility, Maximum Borrowing Capacity |
4,000
|
|
|
| Connecticut Development Authority Note [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Collateralized Agreements |
4,000
|
|
|
| Long-term Line of Credit |
2,761
|
$ 2,817
|
|
| Debt Instrument, Face Amount |
$ 4,000
|
|
|
| Debt Instrument, Interest Rate, Stated Percentage |
5.00%
|
|
|
| Connecticut Clean Energy Fund [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Line of Credit Facility, Maximum Borrowing Capacity |
|
|
$ 5,900
|
| Long-term Line of Credit |
$ 6,052
|
6,052
|
|
| Debt Instrument, Interest Rate, Stated Percentage |
|
|
5.00%
|
| NRG Energy, Inc. [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Long-term Line of Credit |
$ 1,286
|
$ 3,763
|
|