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Commitments and Contingencies (Details) - USD ($) $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 01, 2016 | Jan. 19, 2016 | Dec. 31, 2016 | Sep. 30, 2016
Indirect Tax Audits |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss during the period |  |  | $ 1.8 |
Provider Companies | Pending Litigation | Halifax-American Energy Company, LLC et al v. Provider Power, LLC, Electricity N.H., LLC, Electricity Maine, LLC, Emile Clavet and Kevin Dean |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Litigation settlement amount |  | $ (0.6) |  |
Attorney fees |  | $ 0.3 |  |
Appeal bond | $ 1.0 |  |  |
Contingent liabilities |  |  |  | $ 1.0

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