Agreements with Invus, L.P. (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended
	Dec. 31, 2011	Aug. 31, 2007
Schedule of Capitalization
Invus Purchase Shares		50,824,986
Rights Offering, Shares	142,492,883
Rights Offering, Price Per Share	$ 1.13
Rights Offering Net Proceeds	$ 160.6
Rights Offering, Offering Expenses	$ 0.4
Rights Offering, Invus Shares	115,044,247
Rights Offering, Invus Ownership Percentage	50.00%
Rights Offering, Stock Price	$ 1.14