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Earnings Per Common Share - Additional information (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 189,259 12,000 69,759 12,000
Maximum        
Exercise price $ 4.22 $ 4.22 $ 4.22 $ 4.22
Minimum        
Exercise price $ 2.96 $ 4.19 $ 3.20 $ 4.19