Goodwill and Intangible Assets - Summary of Company's Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 75,375	$ 66,519
Accumulated Amortization	4,362	1,753
Intangibles, net	71,013	64,766
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,585	1,585
Accumulated Amortization	1,091	801
Intangibles, net	494	784
Acquired technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,410	3,410
Accumulated Amortization	709	533
Intangibles, net	2,701	2,877
Acquired in-process research and development [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	37,660	25,404
Accumulated Amortization	0	0
Intangibles, net	37,660	25,404
Patent rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	32,720	36,120
Accumulated Amortization	2,562	419
Intangibles, net	$ 30,158	$ 35,701