Subsequent Event (Details) - Subsequent Event [Member] - Bayer [Member] $ in Millions	Apr. 28, 2016 USD ($)
Subsequent Event [Line Items]
License upfront payment receivable	$ 4
Potential clinical and regulatory development milestones	49
Potential net sales milestones	$ 130

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration