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Basis of Presentation - Basic and Diluted Net Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Earning Per Share Basic And Diluted [Abstract]        
Weighted average shares outstanding 5,868,107 6,046,113 5,851,973 6,097,904
Weighted average director deferred shares 114,740 114,961 114,504 116,188
Basic shares 5,982,847 6,161,074 5,966,477 6,214,092
Dilutive shares 419,650 419,650 419,650 419,650
Diluted shares 6,402,497 6,580,724 6,386,127 6,633,742
Net income $ 2,023 $ 1,415 $ 4,095 $ 2,776
Basic net income per share $ 0.34 $ 0.23 $ 0.69 $ 0.45
Diluted net income per share $ 0.31 $ 0.22 $ 0.64 $ 0.42