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Leases - Additional Information (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Leases    
Lessee, Operating Lease, Term of Contract 11 years  
operating lease liabilities $ 2.5  
Selling, General and Administrative Expenses [Member]    
Leases    
Operating lease expense $ 2.5 $ 2.2