Goodwill and Other Intangible Assets (Schedule of Identifiable Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 11,935	$ 12,857
Accumulated Amortization	(2,710)	(2,064)
Intangible Assets, Net	9,225	10,793
Collaboration agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,713	3,999
Accumulated Amortization	(1,306)	(994)
Intangible Assets, Net	2,407	3,005
Proprietary adjuvant technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,222	8,858
Accumulated Amortization	(1,404)	(1,070)
Intangible Assets, Net	$ 6,818	$ 7,788