Equity (Common Stock) (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended	1 Months Ended
	Jun. 30, 2012	Dec. 31, 2014	Feb. 28, 2014	Jan. 31, 2013	Apr. 30, 2014	Mar. 31, 2013	May 31, 2012
Equity [Line Items]
Common stock, par value		0.001
Common stock, shares authorized		125,000,000
Underwritten public offering description	In June 2012, we completed an underwritten public offering of 8.6 million shares of common stock at a price of $7.50 per common share ($7.13 per common share, net of underwriting discounts) for net proceeds of $60.8 million.
Number of shares offered	8,600,000
Stock price	$ 7.50
Stock price, net of underwriting discount	$ 7.13
Net proceeds	$ 60.8
Lititgation Settlement Warrants [Member]
Equity [Line Items]
Number of common stock shares warrants can be converted into					2,130,680
Warrants exercise price					$ 5.29
Warrants expiration date		Apr. 16, 2019
Securities Purchase Agreement [Member]
Equity [Line Items]
Common stock, shares issued			2,900,000
Number of common stock shares warrants can be converted into			700,000
Value of common stock issued			$ 12.5
Warrants exercise price			$ 5.292
Warrants expiration date		Feb. 28, 2019
Warrants Expiring On January 9, 2018 [Member]
Equity [Line Items]
Number of common stock shares warrants can be converted into				1,000,000
Warrants exercise price				$ 7.31
Warrants expiration date		Jan. 09, 2018		Jan. 09, 2018
Warrants Expiring On April 30, 2018 [Member]
Equity [Line Items]
Number of common stock shares warrants can be converted into						3,440,000
Warrants exercise price						$ 3.014
Warrants expiration date		Apr. 30, 2018
Warrants Expiring On May 21, 2018 [Member]
Equity [Line Items]
Number of common stock shares warrants can be converted into						560,000
Warrants exercise price						$ 3.685
Warrants expiration date		May 21, 2018
Warrants Expiring On January 24, 2016 [Member]
Equity [Line Items]
Number of common stock shares warrants can be converted into							2,000,000
Warrants exercise price							$ 10.50
Warrants expiration date		Jan. 24, 2016