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Subsequent Events - Additional Information (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 21, 2021
USD ($)
shares
Jan. 18, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Jan. 21, 2021
€ / shares
Jan. 21, 2021
$ / shares
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Proceeds from issuance of common stock, net of issuance costs     $ 38,072 $ 74,184    
Subsequent Event | Underwriters            
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Issuance of common stock, net, shares | shares 4,848,485          
Purchase price per share | € / shares         € 0.09  
Public offering price per share | $ / shares           $ 24.75
Net proceeds from public offering $ 129,700          
Subsequent Event | Maximum [Member] | Underwriters            
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Sale of common stock | shares 727,272          
Collaboration and License Agreement and Share Subscription Agreement | Subsequent Event            
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Non-refundable upfront payment receivable   $ 40,000        
Milestone payments receivable   $ 1,600,000        
Issuance of common stock, net, shares | shares   706,834        
Purchase price per share | $ / shares   $ 28.295        
Proceeds from issuance of common stock, net of issuance costs   $ 20,000        
Collaboration and License Agreement and Share Subscription Agreement | Subsequent Event | Maximum [Member]            
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]            
Future contingent development and regulatory milestones receivable   290,000        
Commercial sales milestones   $ 250,000