Goodwill and Other Intangible Assets (Schedule of Identifiable Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 12,776	$ 12,857
Accumulated Amortization	(2,476)	(2,064)
Intangible Assets, Net	10,300	10,793
Collaboration agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,974	3,999
Accumulated Amortization	(1,193)	(994)
Intangible Assets, Net	2,781	3,005
Proprietary adjuvant technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,802	8,858
Accumulated Amortization	(1,283)	(1,070)
Intangible Assets, Net	$ 7,519	$ 7,788