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Commitment and Contingencies - Additional Information (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Oct. 31, 2021
Aug. 31, 2021
Sep. 30, 2021
Sep. 30, 2021
Jan. 01, 2021
Lessor, Lease, Description [Line Items]          
Accrued Liabilities     $ 1,800 $ 1,800  
Lease liabilities     12,539 12,539  
Long-term Debt     10,700 10,700  
Operating lease costs     $ 500 1,200  
Cash paid for operating lease       $ 1,500  
Weighted average discount rate     8.20% 8.20%  
Weighted-average remaining lease term     6 years 7 months 9 days 6 years 7 months 9 days  
Right-of-use assets     $ 12,000 $ 12,000  
ASU No. 2016-02          
Lessor, Lease, Description [Line Items]          
Lease liabilities         $ 2,500
Right-of-use assets         $ 1,700
South San Francisco, California          
Lessor, Lease, Description [Line Items]          
Operating lease, renewal term     1 year 1 year  
Extend the lease term   May 2028      
San Diego, California          
Lessor, Lease, Description [Line Items]          
Operating lease, renewal term     36 months 36 months  
Extend the lease term February 2022