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Commitments and Contingencies - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Supply Agreement          
Commitment And Contingencies [Line Items]          
Payments for inventory $ 0        
Supply Agreement | Maximum          
Commitment And Contingencies [Line Items]          
Purchase of inventory $ 2,000,000.0        
Office Space and Research Facilities Lease          
Commitment And Contingencies [Line Items]          
Operating leases, rent expense   $ 284,000 $ 239,000 $ 832,000 $ 729,000
Operating lease, renewal term 5 years 5 years   5 years  
Lease expiration date       2025-11