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Leases - Additional Information (Details)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Nov. 30, 2017
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Apr. 30, 2021
Dec. 31, 2020
USD ($)
Aug. 31, 2007
ft²
Lessee Lease Description [Line Items]                
Initial base rent $ 1,000              
Restricted cash   $ 329   $ 329     $ 329  
Extended lease term 2023-04              
Operating lease cost   264 $ 264 792 $ 791      
Research and Development                
Lessee Lease Description [Line Items]                
Operating lease cost   $ 700   $ 1,700        
Clinical Supply Agreement                
Lessee Lease Description [Line Items]                
Operating lease period           5 years    
Operating Lease, renewal term           1 year    
Office and Laboratory                
Lessee Lease Description [Line Items]                
Area of property | ft²               22,343
Office Equipment                
Lessee Lease Description [Line Items]                
Lease initiation date       Apr. 30, 2020        
Lease expiration date       Jun. 30, 2024        
Certificate of Deposits                
Lessee Lease Description [Line Items]                
Restricted cash $ 300              
Letter of Credit                
Lessee Lease Description [Line Items]                
Secured debt obligations $ 300