Commitments and Contingencies (Collaboration Agreement) (Details) - Development agreement - Drug delivery system item in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) item
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaborative Agreement, Upfront Payment	$ 0.5
Collaborative Agreement, Milestone Payments	0.4
Collaborative Agreement, Contingent Obligation	$ 1.7
Collaborative Agreement, Contingent Purchase Obligation First 12 Months, Units | item	1.0
Purchase period	12 months