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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Computation of diluted earnings per common share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Numerator:                      
Net income (loss) $ 889 $ 1,183 $ (375) $ 1,904 $ (5,321) $ 647 $ (187) $ 1,515 $ 3,601 $ (3,346) $ 7,448
Denominator:                      
Weighted average common shares outstanding (basic) (in shares)                 16,802 17,143  
Effect of stock options (in shares)                 0 1  
Weighted average common shares outstanding (diluted) (in shares)                 16,802 17,144  
Earnings per common share:                      
Basic (in dollars per share) $ 0.05 $ 0.07 $ (0.02) $ 0.11 $ (0.31) $ 0.04 $ (0.01) $ 0.09 $ 0.21 $ (0.2)  
Diluted (in dollars per share) $ 0.05 $ 0.07 $ (0.02) $ 0.11 $ (0.31) $ 0.04 $ (0.01) $ 0.09 $ 0.21 $ (0.2)