Subsequent Events (Details) - License Agreement - License Arrangement - Millennium Pharmaceuticals Inc [Member] - Subsequent Event. $ in Millions	Jul. 27, 2017 USD ($)
Subsequent Event
Upfront payment receivable within 10 days of the execution of the agreement	$ 100
Number of days after execution of agreement within which an upfront payment will be received	10 days
Potential milestone payments	$ 240

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