Subsequent Events (Details) - Subsequent Event $ in Millions	Oct. 12, 2017 USD ($)
Subsequent Event [Line Items]
Upfront payment from development and license agreement	$ 6
Phase Two Initiation
Subsequent Event [Line Items]
Milestone payment from development and license agreeement	6
Regulatory And Development
Subsequent Event [Line Items]
Milestone payment from development and license agreeement	31
Sales Revenue
Subsequent Event [Line Items]
Milestone payment from development and license agreeement	$ 75