Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 18,541			$ 18,541		$ 22,441
Reduced goodwill		$ 3,900
Reduced deferred tax liabilities		800
Reduced CVR liability		$ 3,100
Measurement period of merger				1 year
Amortization of intangible assets	$ 423		$ 0	$ 1,265	$ 0
Novartis
Goodwill And Intangible Assets [Line Items]
Intangible assets, weighted average period				16 years 8 months 12 days
Novartis | Minimum
Goodwill And Intangible Assets [Line Items]
Intangible assets, amortization period				9 years
Novartis | Maximum
Goodwill And Intangible Assets [Line Items]
Intangible assets, amortization period				17 years
Acquired IPR&D assets
Goodwill And Intangible Assets [Line Items]
Acquired IPR&D decreased				$ 2,700