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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, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Earning per share basic and diluted [Abstract]        
Weighted average shares outstanding 6,046,113 6,214,225 6,097,904 6,203,379
Weighted average director deferred shares 114,961 114,569 116,188 113,219
Basic shares 6,161,074 6,328,794 6,214,092 6,316,598
Dilutive shares 419,650 421,000 419,650 421,000
Diluted shares 6,580,724 6,749,794 6,633,742 6,737,598
Net income $ 1,415 $ 953 $ 2,776 $ 1,903
Basic net income per share $ 0.23 $ 0.15 $ 0.45 $ 0.30
Diluted net income per share $ 0.22 $ 0.14 $ 0.42 $ 0.28