Quarterly report pursuant to Section 13 or 15(d)

Acquisitions, Investments, and Licenses - Available for Sale Investments, Sale of Investments and Warrants and Options Narrative (Details)

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Acquisitions, Investments, and Licenses - Available for Sale Investments, Sale of Investments and Warrants and Options Narrative (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Jul. 31, 2015
Dec. 31, 2014
Investment [Line Items]        
Gain (loss) on sale of investments $ 216 $ 1,273    
Other Income        
Investment [Line Items]        
Gain (loss) on sale of investments   $ 1,300    
Neovasc        
Investment [Line Items]        
Warrants to purchase common shares       1,000,000
Cocrystal        
Investment [Line Items]        
Warrants to purchase common shares       1,000,000
ARNO        
Investment [Line Items]        
Warrants to purchase common shares       800,000
Sevion        
Investment [Line Items]        
Warrants to purchase common shares     333,333 500,000
MabVax        
Investment [Line Items]        
Warrants to purchase common shares       1,700,000
Rxi Pharmaceuticals Corporation        
Investment [Line Items]        
Ownership percentage 3.00%      
ChromaDex        
Investment [Line Items]        
Ownership percentage 2.00%      
ARNO        
Investment [Line Items]        
Ownership percentage 4.00%