EARNINGS PER COMMON SHARE - Computation of earnings 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
Numerator:
Net income available for common shareholders	$ 1,506	$ 4,482	$ 5,326	$ 10,006
Denominator:
Basic weighted average shares (in shares)	9,532,397	9,450,987	9,518,135	9,434,742
Earnings per common share - basic (in dollars per share)	$ 0.16	$ 0.47	$ 0.56	$ 1.06
Numerator:
Net income available for common shareholders	$ 1,506	$ 4,482	$ 5,326	$ 10,006
Denominator:
Basic weighted average shares (in shares)	9,532,397	9,450,987	9,518,135	9,434,742
Total diluted effect of common stock equivalents
Total diluted effect of common stock equivalents (in shares)	154,004	266,680	191,483	310,169
Diluted weighted average shares (in shares)	9,686,401	9,717,667	9,709,618	9,744,911
Earnings per common share - diluted (in dollars per share)	$ 0.16	$ 0.46	$ 0.55	$ 1.03
Stock options
Total diluted effect of common stock equivalents
Diluted effect of common stock equivalents (in shares)	0	52,870	8,012	55,005
Time Vesting Units
Total diluted effect of common stock equivalents
Diluted effect of common stock equivalents (in shares)	70,151	122,090	97,689	155,813
Financial Performance Units
Total diluted effect of common stock equivalents
Diluted effect of common stock equivalents (in shares)	83,853	91,720	85,782	92,524
Market Performance Units
Total diluted effect of common stock equivalents
Diluted effect of common stock equivalents (in shares)	0	0	0	6,827