Licensed Technology (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Licensing and milestone fees	$ 521	$ 754	$ 493
GeorgeWashington [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
One-time license initiation fee			250
InsermTransfertSA [Member]
Research and Development Arrangement, Contract to Perform for Others [Line Items]
One-time license initiation fee			$ 140