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Debt Balance Sheet and Income Statement Summary (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 31, 2015 | Jul. 08, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014 | Aug. 01, 2014
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Commitment fee amount, less than |  |  |  |  | $ 0.1 | $ 0.1 |  |
Letters of credit issued and outstanding |  |  | $ 20.7 |  | 20.7 |  |  |
Deferred financing costs |  |  | 0.5 |  | 0.5 |  | $ 0.3 |
Amortization of deferred financing costs |  |  | 0.2 | $ 0.4 | 0.3 | 0.6 |  |
Senior Secured Revolving Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Capitalized deferred financing costs |  | $ 0.8 |  |  |  |  |  |
Debt issuance expense |  | $ 0.1 |  |  |  |  |  |
Working Capital Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest expense |  |  | 0.4 | 0.6 | 0.7 | 1.2 |  |
Commitment fee amount, less than |  |  | 0.1 | 0.1 |  |  |  |
Letters of credit issued and outstanding |  |  |  |  |  |  |  | $ 15.0
Fees on letters of credit issued and outstanding |  |  | 0.1 | $ 0.1 | 0.2 | $ 0.3 |  |
Other Current Assets |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Deferred financing costs |  |  | 0.5 |  | 0.5 |  | 0.2 |
Other Noncurrent Assets |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Deferred financing costs |  |  |  |  |  |  | $ 0.1 |
Convertible Debt |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest expense debt |  |  | 0.1 |  | 0.1 |  |  |
Convertible Debt | Oasis Power Holdings Convertible Debt |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Beneficial conversion feature | $ 0.8 |  |  |  |  |  |  |
Amortization of debt discount (less than $1.0) |  |  | $ 0.1 |  | $ 0.1 |  |  |
Convertible Subordinated Debt | Oasis Power Holdings Convertible Debt |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Beneficial conversion feature | $ 0.8 |  |  |  |  |  |  |

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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