Equity Transactions (Details) - USD ($) $ / shares in Units, $ in Millions						3 Months Ended
	Jul. 24, 2015	Jul. 06, 2015	Apr. 27, 2015	Feb. 05, 2014	Jan. 01, 2014	Mar. 31, 2014	Sep. 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	$ 28.7			$ 86.0
Stock issued, underwritten public offering, value (in shares)	10,500,000			13,200,000
Common stock per share value (in dollars per share)	$ 2.75			$ 6.50
Net proceeds from issuance of common stock	$ 26.8	$ 0.6		$ 80.5
Common shares issued from the exercise of stock options (in shares)		287,143
Common stock, shares issued (in shares)							66,679,340	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