Acquisitions - Narrative, Bioligics (Details) - USD ($)		9 Months Ended
	Nov. 16, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Payments to acquire business		$ 0	$ 4,850,000
Eagle Biologics
Business Acquisition [Line Items]
Payments to acquire business	$ 27,209,000
Business combination equity consideration (in shares)	40,200
Business combination equity consideration	$ 3,046,000
Milestone Payments | Eagle Biologics
Business Acquisition [Line Items]
Business combination, contingent consideration range of outcome high	48,000,000
Business combination consideration including contingent consideration	$ 78,000,000