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Acquisition - Acquisition of Bellwether Bio (Details) - USD ($)
$ in Thousands
1 Months Ended
Apr. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Business Acquisition [Line Items]      
Contingent liability from business acquisition   $ 0 $ 1,135
Bellweather Bio, Inc.      
Business Acquisition [Line Items]      
Total purchase consideration $ 8,700    
Cash paid upon closing 7,600    
Contingent liability from business acquisition 1,100    
Identified intangible assets 6,700    
Commercialization Milestones | Bellweather Bio, Inc.      
Business Acquisition [Line Items]      
Maximum contingent liability 10,000    
Earn-Out Consideration | Bellweather Bio, Inc.      
Business Acquisition [Line Items]      
Maximum contingent liability 10,000    
Covenants Not To Compete | Bellweather Bio, Inc.      
Business Acquisition [Line Items]      
Identified intangible assets $ 2,500    
Estimated Useful Life 6 years