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EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Basic                
Net income attributable to common stockholders $ 3,206 $ 3,662 $ 4,696 $ 3,993 $ 4,366 $ 4,706 $ 6,868 $ 9,072
Weighted average common shares outstanding (shares) 10,478,000       10,530,000   10,475,000 10,528,000
Basic earnings per share (USD per share) $ 0.31       $ 0.41   $ 0.66 $ 0.86
Diluted                
Net income attributable to common stockholders $ 3,206 $ 3,662 $ 4,696 $ 3,993 $ 4,366 $ 4,706 $ 6,868 $ 9,072
Weighted average common shares outstanding (shares) 10,478,000       10,530,000   10,475,000 10,528,000
Add: Dilutive stock options outstanding (shares) 0       12,000   2,000 13,000
Average shares and dilutive potential common shares (shares) 10,478,000       10,542,000   10,477,000 10,541,000
Diluted earnings per share (USD per share) $ 0.31       $ 0.41   $ 0.66 $ 0.86
Additional common stock option shares that have not been included due to their antidilutive effect (shares) 40,000       0   40,000 0