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Earnings Per Common Share - Additional information (Details) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 216,759 12,000 29,500 12,000
Maximum        
Exercise price $ 4.22 $ 4.22 $ 4.22 $ 4.22
Minimum        
Exercise price $ 2.96 $ 4.19 $ 3.90 $ 4.19