Other non-current Assets (Details) $ in Thousands		3 Months Ended			9 Months Ended
	Apr. 01, 2016 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) Payment	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Royalty receivable		$ 6,000			$ 6,000		$ 7,000
Other		905			905		836
Total other non-current assets		6,905			6,905		$ 7,836
Revenues		13,287	$ 8,260		39,754	$ 38,700
License Agreement with Sunovion Pharmaceuticals, Inc.
Acquired Finite-Lived Intangible Assets [Line Items]
Revenues	$ 22,000
Minimum annual royalty receivable		$ 1,000		$ 1,000	$ 1,000
Guaranteed royalty period				8 years	8 years
Number of annual royalty payments receivable | Payment					7
Royalty
Acquired Finite-Lived Intangible Assets [Line Items]
Revenues					$ (1,077)
Royalty | License Agreement with Sunovion Pharmaceuticals, Inc.
Acquired Finite-Lived Intangible Assets [Line Items]
Revenues				$ 8,000