Quarterly report pursuant to Section 13 or 15(d)

Acquisitions, Investments and Licenses - Summary of Investments (Details)

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Acquisitions, Investments and Licenses - Summary of Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Business Combinations [Abstract]    
Equity method investments, investment carrying value $ 22,725  
Equity method investment, underlying equity in net assets 22,106  
Variable interest entity, equity method 667  
Available for sale investments 7,205  
Warrants and options 4,615  
Total carrying value of investments $ 35,212 $ 34,716