The amount of consideration recognized during the period for the milestone or milestones.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 28
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=68058744&loc=SL6892177-166501

Name:	us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Subsequent Events (Details) - GlaxoSmithKline [Member] - USD ($) $ in Millions	1 Months Ended		3 Months Ended
	May. 09, 2016	Sep. 30, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Revenue recognized		$ 6.5	$ 5.0
Subsequent Event [Member]
Subsequent Event [Line Items]
Revenue recognized	$ 7.5