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Summary of Significant Accounting Policies - Basic and Diluted Net Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Earnings Per Share [Abstract]                    
Weighted average shares outstanding                 5,851,702 5,969,575
Weighted average director deferred shares                 112,857 114,483
Basic shares                 5,964,559 6,084,058
Dilutive shares                 411,900 419,650
Diluted shares                 6,376,459 6,503,708
Net income                 $ 8,485 $ 6,864
Basic net income per share $ 0.38 $ 0.35 $ 0.34 $ 0.35 $ 0.37 $ 0.31 $ 0.23 $ 0.22 $ 1.42 $ 1.13
Diluted net income per share $ 0.36 $ 0.33 $ 0.31 $ 0.33 $ 0.35 $ 0.29 $ 0.22 $ 0.20 $ 1.33 $ 1.06