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Acquisitions - Asset Acquisition (Details) - USD ($)
$ in Thousands
 1 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 12, 2020
Dec. 31, 2019
Apr. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Business Acquisition [Line Items]            
Consideration transferred         $ 0 $ 3,297
IPR&D            
Business Acquisition [Line Items]            
Consideration transferred $ 2,100 $ 1,200 $ 100 $ 700    
Future payments for asset acquisition   $ 300        
Expected repayment time period   18 months        
Payments for asset acquisition $ 2,900 $ 1,500