EARNINGS PER SHARE - Basic earnings per share of common stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Basic and diluted:
Options outstanding	0	0
Net income	$ 255	$ 316
Weighted average common shares outstanding (in shares)	2,802,509	2,789,012
Basic net income per share (in dollars per share)	$ 0.09	$ 0.11