Equity Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Dec. 31, 2011	Jun. 30, 2012	Jul. 08, 2011
Equity Transactions [Abstract]
Stock issued, underwritten public offering, value	$ 20.4
Stock issued underwritten public offering (in shares)	39,200,000
Common stock, share purchase, Maximum (in shares)	45,100,000
Warrants per share value (in dollars per share)	$ 0.01
Exercise price of common stock (in dollars per share)	$ 0.64
Net proceeds from issuance of common stock	$ 18.9
Common stock, shares authorized (in shares)	250,000,000	250,000,000	175,000,000
Series A preferred stock, shares authorized (in shares)	25,000	25,000	15,000