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Earnings Per Common Share - Additional information (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 22,000 189,259 22,000 69,759
Maximum        
Exercise price $ 4.22 $ 4.22 $ 4.22 $ 4.22
Minimum        
Exercise price $ 4.00 $ 2.96 $ 4.00 $ 3.20