License Agreements - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jan. 31, 2021
Research And Development Expense
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
License expenses recognized	$ 2.8	$ 1.0	$ 2.9	$ 2.5
License Agreement
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Milestone payment based on achievement of specified development	$ 365.9		$ 365.9
License Agreement | Medivir AB
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Additional milestone payment					$ 1.5
Upfront payment					1.0
License Agreement | Medivir AB | Maximum
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Milestone payment based on achievement of specified development					$ 348.5