Equity Transactions (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended	6 Months Ended
	Apr. 27, 2015	Feb. 05, 2014	Jan. 01, 2014	Mar. 31, 2014	Jun. 30, 2015	Dec. 31, 2014	Mar. 15, 2014
Equity Transactions [Abstract]
Common shares issued from the exercise of warrants (in shares)	5,211			278,000
Restricted shares granted (in shares)			100,000
Non-cash expense of shares issued					$ 0.6
Stock issued, underwritten public offering, value		$ 86.0
Stock issued, underwritten public offering, value (in shares)		13,200,000
Common stock per share value (in dollars per share)		$ 6.50
Net proceeds from issuance of common stock		$ 80.5
Common stock, shares issued (in shares)					55,927,197	55,921,986	200,000
Warrants issued, rights (in shares)	10,000						25,000
Common stock, fair value							$ 0.8
Proceeds from the issuance of warrants				$ 0.4