EARNINGS PER SHARE - Basic earnings per share of common stock (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
Basic and diluted earnings per share:
Net income	$ 309	$ 480	$ 540	$ 1,074
Weighted average common shares outstanding, basic	2,857,616	2,847,191	2,856,441	2,845,493
Weighted average common shares outstanding, diluted	2,855,253	2,843,775
Net income per share (basic)	$ 0.11	$ 0.17	$ 0.19	$ 0.38
Net income per share (diluted)	$ 0.08	$ 0.21	$ 0.08	$ 0.21
Options outstanding	0	0	0	0