LOANS AND ALLOWANCE FOR LOAN LOSSES - Activity in allowance for loan losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Beginning balance	$ 6,762	$ 7,379	$ 6,745	$ 7,487	$ 7,487
Charge-offs	(38)	(436)	(117)	(595)	(1,039)
Recoveries	2	3	6	4	97
Provision	46	0	138	50	200
Ending Balance	6,772	6,946	6,772	6,946	6,745
Ending balance: individually evaluated for impairment	3	23	3	23	1
Ending balance: collectively evaluated for impairment	6,769	6,923	6,769	6,923	6,744
Ending Balance	612,081	584,824	612,081	584,824	606,392
Ending balance: individually evaluated for impairment	13,272	13,329	13,272	13,329	17,593
Ending balance: collectively evaluated for impairment	598,809	571,495	598,809	571,495	588,799
Commercial and Industrial [Member]
Beginning balance	732	1,017	724	949	949
Charge-offs	0	(8)	0	(8)	(18)
Recoveries	0	0	1	1	31
Provision	(89)	(102)	(82)	(35)	(238)
Ending Balance	643	907	643	907	724
Ending balance: individually evaluated for impairment	0	0	0	0	0
Ending balance: collectively evaluated for impairment	643	907	643	907	724
Ending Balance	81,553	100,469	81,553	100,469	92,220
Ending balance: individually evaluated for impairment	1,105	1,175	1,105	1,175	1,126
Ending balance: collectively evaluated for impairment	80,448	99,294	80,448	99,294	91,094
Commercial Real Estate [Member]
Beginning balance	3,865	4,528	3,700	4,067	4,067
Charge-offs	0	(343)	(64)	(460)	(783)
Recoveries	0	0	0	0	60
Provision	34	(205)	263	373	356
Ending Balance	3,899	3,980	3,899	3,980	3,700
Ending balance: individually evaluated for impairment	0	4	0	4	1
Ending balance: collectively evaluated for impairment	3,899	3,976	3,899	3,976	3,699
Ending Balance	364,390	316,066	364,390	316,066	348,476
Ending balance: individually evaluated for impairment	11,333	11,192	11,333	11,192	15,890
Ending balance: collectively evaluated for impairment	353,057	304,874	353,057	304,874	332,586
Residential Portfolio Segment [Member]
Beginning balance	1,641	1,672	1,650	1,656	1,656
Charge-offs	(28)	(77)	(28)	(106)	(181)
Recoveries	0	0	2	0	0
Provision	28	93	17	138	175
Ending Balance	1,641	1,688	1,641	1,688	1,650
Ending balance: individually evaluated for impairment	3	19	3	19	0
Ending balance: collectively evaluated for impairment	1,638	1,669	1,638	1,669	1,650
Ending Balance	160,362	162,480	160,362	162,480	159,741
Ending balance: individually evaluated for impairment	834	962	834	962	577
Ending balance: collectively evaluated for impairment	159,528	161,518	159,528	161,518	159,164
Consumer [Member]
Beginning balance	110	95	117	111	111
Charge-offs	(10)	(8)	(25)	(21)	(57)
Recoveries	2	3	3	3	6
Provision	9	15	16	12	57
Ending Balance	111	105	111	105	117
Ending balance: individually evaluated for impairment	0	0	0	0	0
Ending balance: collectively evaluated for impairment	111	105	111	105	117
Ending Balance	5,776	5,809	5,776	5,809	5,955
Ending balance: individually evaluated for impairment	0	0	0	0	0
Ending balance: collectively evaluated for impairment	5,776	5,809	5,776	5,809	5,955
Unallocated Financing Receivables [Member]
Beginning balance	414	67	554	704	704
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision	64	199	(76)	(438)	(150)
Ending Balance	478	266	478	266	554
Ending balance: individually evaluated for impairment	0	0	0	0	0
Ending balance: collectively evaluated for impairment	478	266	478	266	554
Ending Balance	0	0	0	0	0
Ending balance: individually evaluated for impairment	0	0	0	0	0
Ending balance: collectively evaluated for impairment	$ 0	$ 0	$ 0	$ 0	$ 0