Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets, Gross Carrying Amount	$ 10,400	$ 10,786
Finite Lived Intangible Assets, Accumulated Amortization	607	89
Finite Lived Intangible Assets, Net Book Value	9,793	10,697
Intangible Assets, Gross Carrying Amount	28,434	29,489
Intangible assets, Net Book Value	27,827	29,400
License agreement
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets, Gross Carrying Amount	10,400	10,786
Finite Lived Intangible Assets, Accumulated Amortization	607	89
Finite Lived Intangible Assets, Net Book Value	9,793	10,697
Acquired IPR&D assets
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets, Gross Carrying Amount	$ 18,034	$ 18,703