Annual report pursuant to Section 13 and 15(d)

Goodwill and In-Process Research and Development - Schedule of In-process Research and Development Intangible Assets (Details)

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Goodwill and In-Process Research and Development - Schedule of In-process Research and Development Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
Balance, January 1, $ 53,905 $ 53,905
Impairment charges (53,905)
Balance at December 31, $ 53,905