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, 2017
Dec. 31, 2016
Business Combinations [Abstract]    
Equity method investments, investment carrying value $ 29,565  
Equity method investment, underlying equity in net assets 23,693  
Variable interest entity, equity method 48  
Available for sale investments 3,992  
Warrants and options 608  
Cost method investment 3,072  
Total carrying value of investments $ 37,285 $ 41,139