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Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Earnings per share:        
Net earnings $ 2,500 $ 4,517 $ 8,666 $ 14,864
Weighted average common shares outstanding - basic (1) [1] 4,979,305 4,996,419 4,988,327 4,993,808
Assumed exercise of stock options (1) [1] 13,145 14,554 14,831 9,807
Weighted average common shares outstanding - diluted (1) [1] 4,992,450 5,010,973 5,003,158 5,003,615
Basic [1],[2] $ 0.50 $ 0.90 $ 1.74 $ 2.98
Diluted [1],[2] $ 0.50 $ 0.90 $ 1.73 $ 2.97
[1] Share and per share values for the periods ended September 30, 2021 have been adjusted to give effect to the 5% stock dividend paid during December 2021.
[2] Per share amounts for the periods ended September 30, 2021 have been adjusted to give effect to the 5% stock