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Subsequent Events (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Jun. 30, 2014	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2016	Mar. 31, 2014	Feb. 03, 2014
Subsequent Event [Line Items]
Mandatorily Redeemable Preferred Stock, Fair Value Disclosure					$ 0	$ 0	$ 6.6
Common stock and warrants issued at $4.00 per unit		13.1	13.1
Share Price	$ 0us-gaap_SharePrice			$ 0us-gaap_SharePrice			$ 25.000us-gaap_SharePrice
Convertible Preferred Stock, Shares Issued upon Conversion			1,642,975
Exercise of warrants	2,875,000		3,280,790
Gain (Loss) on Sale of Project			6.7us-gaap_GainLossOnSaleOfProject
Series A [Member]
Subsequent Event [Line Items]
Share Price			$ 0	$ 0
Debt Instrument, Maturity Date, Description				8.71
Exercise of warrants				3,280,790
Series B [Member]
Subsequent Event [Line Items]
Share Price			$ 5.00	$ 0
Series C Preferred Stock [Member]
Subsequent Event [Line Items]
Share Price			$ 5.00
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right			6.25
Debt Instrument, Convertible, Conversion Price			$ 4.00
Class of Warrant or Right [Domain]
Subsequent Event [Line Items]
Exercise of warrants				4,923,765
Maximum [Member]
Subsequent Event [Line Items]
Share Price	$ 18.00		$ 15.00
Common Stock, Capital Shares Reserved for Future Issuance	125,000
Minimum [Member]
Subsequent Event [Line Items]
Cash			2.0
Share Price	$ 12.00		$ 10.00
Preferred Stock, Value, Outstanding			$ 3.0
Common Stock, Capital Shares Reserved for Future Issuance	125,000		1,500,000
Performance Share Grant Agreement [Member]
Subsequent Event [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance	375,000		100,000