Material Agreements, License Agreement with Sunovion Pharmaceuticals (Details) - License Agreement with Sunovion Pharmaceuticals, Inc. [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2020
License Agreement with Sunovion Pharmaceuticals, Inc. [Abstract]
Payment receivable		$ 4,000
Aggregate payments received		22,000
Upfront payment received		5,000
Aggregate milestone payments receivable		17,000
One-time milestone payment ,no longer entitled to receive		$ 23,000
Royalty [Member]
License Agreement with Sunovion Pharmaceuticals, Inc. [Abstract]
Revenues	$ 8,000
Royalty [Member] | Minimum [Member]
License Agreement with Sunovion Pharmaceuticals, Inc. [Abstract]
Revenues	$ 8,000