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Subsequent Event (Details) - Subsequent Event - Collaboration Agreement with Aurigene Discovery Technologies Limited Collaboration Agreement $ in Millions	1 Months Ended
	Jul. 31, 2019 USD ($) program
Subsequent Event [Line Items]
Number of oncology programs included in collaboration agreement | program	6
Upfront payment	$ 10.0
Additional upfront payment	2.5
Research funding commitment (up to)	32.6
Maximum amount eligible for development and regulatory milestones	148.8
Maximum amount eligible for commercial milestones under collaborations agreement	280.0
Minimum
Subsequent Event [Line Items]
Option exercise fee payment, if exercised	10.0
Maximum
Subsequent Event [Line Items]
Option exercise fee payment, if exercised	$ 12.0

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- Definition

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- Definition

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- Definition

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.

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