Equity Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended		3 Months Ended
	Feb. 05, 2014	Oct. 15, 2013	Mar. 31, 2014	Mar. 15, 2014	Dec. 31, 2013
Equity Transactions [Abstract]
Restricted shares granted (in shares)					100,000
Stock issued, underwritten public offering, value	$ 86.0	$ 25.9
Stock issued, underwritten public offering, value (in shares)	13,225,000	11,500,000
Common stock per share value (in dollars per share)	$ 6.50	$ 2.25
Net proceeds from issuance of common stock	80.5	24.1
Common stock, shares issued (in shares)			55,920,319	200,000	42,116,964
Common stock, fair value				0.8
Common shares issued from the exercise of warrants (in shares)			278,000
Proceeds from the issuance of warrants			$ 0.4