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
Sep. 30, 2017
Dec. 31, 2016
Business Combinations [Abstract]    
Equity method investments, investment carrying value $ 24,101  
Equity method investment, underlying equity in net assets 23,910  
Variable interest entity, equity method 361  
Available for sale investments 3,108  
Warrants and options 2,606  
Cost method investment 2,020  
Total carrying value of investments $ 32,196 $ 41,139