Disposition Of Pharmaceutical Product Lines And Restructuring (Details) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 31, 2009 Acarexx And SURPASS Products And Feline Insulin Product Under Development [Member]	Dec. 31, 2008 Acarexx And SURPASS Products And Feline Insulin Product Under Development [Member]	Dec. 31, 2013 Royalty Bearing License Agreement [Member]	Dec. 31, 2010 Royalty Bearing License Agreement [Member]	Dec. 31, 2009 Feline Insulin Product [Member]	Dec. 31, 2012 Feline Insulin Product [Member]	Dec. 31, 2011 Feline Insulin Product [Member]	Dec. 31, 2010 Feline Insulin Product [Member]	Dec. 31, 2008 Feline Insulin Product Total Potential Milestone Payments [Member]	Dec. 31, 2013 Royalty Bearing License Agreement Total Remaining Potential Milestone Payments [Member]
Disposition Of Pharmaceutical Product Lines And Restructuring [Line Items]
Proceeds from disposition of pharmaceutical product lines	$ 3,500,000	$ 3,000,000	$ 3,000,000	$ 1,400,000	$ 7,000,000	$ 300,000
Potential milestone payments												11,500,000	1,600,000
Milestone payment earned							$ 300,000	$ 2,000,000	$ 3,500,000	$ 3,000,000	$ 3,000,000