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) - shares
Mar. 31, 2016
Oct. 31, 2015
Jul. 31, 2015
Rxi Pharmaceuticals Corporation      
Investment [Line Items]      
Ownership percentage 3.00%    
ChromaDex      
Investment [Line Items]      
Ownership percentage 2.00%    
MabVax      
Investment [Line Items]      
Ownership percentage 1.00%    
Warrants to purchase common shares 1,800,000 170,454  
ARNO      
Investment [Line Items]      
Ownership percentage 4.00%    
Warrants to purchase common shares 800,000    
Xenetic Biosciences, Inc.      
Investment [Line Items]      
Ownership percentage 6.00%    
Neovasc      
Investment [Line Items]      
Warrants to purchase common shares 1,000,000    
Cocrystal      
Investment [Line Items]      
Warrants to purchase common shares 1,000,000    
Sevion      
Investment [Line Items]      
Warrants to purchase common shares 500,000   333,333
InCellDx, Inc      
Investment [Line Items]      
Warrants to purchase common shares 700,000