Annual report pursuant to Section 13 and 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
Dec. 31, 2016
Dec. 31, 2015
Long-term Investments [Abstract]    
Equity method investments, carrying value $ 31,471  
Equity method Investments, underlying equity in net assets 30,195  
Variable interest entity, equity method, carrying value 516  
Variable interest entity, equity method, underlying equity in net assets 0  
Available for sale investments, carrying value 4,528  
Cost method investment 607  
Warrants and options 4,017  
Total carrying value of investments $ 41,139 $ 34,716