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Intangible Assets, net - Schedule of Finite-lived Intangible Assets (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 123,274 $ 123,274
Accumulated Amortization (55,321) (49,121)
Net 67,953 74,153
Developed technology    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 112,000 112,000
Accumulated Amortization (49,000) (43,400)
Net $ 63,000 $ 68,600
Weighted-Average Amortization Period 10 years 10 years
Patents and licenses    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount $ 11,274 $ 11,274
Accumulated Amortization (6,321) (5,721)
Net $ 4,953 $ 5,553
Weighted-Average Amortization Period 7 years 9 months 18 days 7 years 9 months 18 days