Other Capital Stock Agreements (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended
	Oct. 31, 2012
Schedule of Capitalization, Equity
Stock Issued During Period, Shares, New Issues	17,500,000
Offering Price Per Share	$ 2.25
Net Proceeds From Stock Offering	$ 37.1
Payments of Underwriting Discounts and Commissions	2.0
Payments of Stock Issuance Costs	$ 0.2
Stock Issued During Period to Invus, Shares	3,000,000