Sunovion License Agreement (Details) - License Agreement - Sunovion Pharmaceutics Canada, Inc. $ in Millions	1 Months Ended	3 Months Ended
Mar. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)
License Agreement
Number of deliverables	2	2
Collaboration revenue - upfront payment
License Agreement
Revenue not accounted for under Topic 606	$ 1.0	$ 1.0

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