EARNINGS PER SHARE - Calculation of earnings per share (Details) - Calculation of earnings per share - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income	$ 6,685	$ 8,457	$ 2,521
Less: Preferred stock dividends declared		(158)	(166)
Net income allocated to common stock	6,685	8,299	2,355
Less: Undistributed earnings allocated to participating securities	(52)	(72)	(27)
Net income allocated to common stock	$ 6,633	$ 8,227	$ 2,328
Weighted average common shares issued	2,755	2,730	1,785
Less: Unvested restricted stock awards	$ (22)	$ (24)	$ (21)
Weighted average common shares outstanding used to calculate basic earnings per common share	2,733	2,706	1,764
Add: Dilutive effect of stock options	$ 16	$ 17	$ 1
Weighted average common shares outstanding used to calculate diluted earnings per common share	2,749	2,723	1,765
Earnings per common share (basic)	$ 2.43	$ 3.04	$ 1.32
Earnings per common share (diluted)	$ 2.41	$ 3.02	$ 1.32