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Commitments and Contingencies - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]        
Rent expense $ 100,000 $ 13,000 $ 100,000 $ 38,000
Lease payments under non-cancelable operating leases $ 600,000   $ 600,000  
Lease expiration date     Jun. 30, 2023