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Leases - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Lessee, Lease, Description [Line Items]        
Operating lease expense $ 0.4 $ 0.4 $ 1.2 $ 1.2
Weighted average remaining lease term for operating leases 5 years 10 months 24 days   5 years 10 months 24 days  
Weighted average discount rate 8.64%   8.64%  
Cash payments for operating lease expense $ 0.4 $ 0.6 $ 1.7 $ 1.2
Minimum        
Lessee, Lease, Description [Line Items]        
Remaining lease term 5 months   5 months  
Maximum        
Lessee, Lease, Description [Line Items]        
Remaining lease term 7 years 3 months   7 years 3 months