LOANS - Changes in allowance for loan losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Residential 1-4 family
Beginning balance	$ 2,074	$ 2,007	$ 2,149	$ 1,862
Acquisition Discount Transfer			10
Provision	175	201	90	355
Charge-offs	(31)		(32)	(10)
Recoveries	1	2	2	3
Ending balance	2,219	2,210	2,219	2,210
Residential 5+ multifamily
Beginning balance	495	258	413	155
Acquisition Discount Transfer
Provision	(5)	80	77	183
Charge-offs
Recoveries
Ending balance	490	338	490	338
Construction of residential 1-4 family
Beginning balance	79	82	83	75
Acquisition Discount Transfer
Provision	4	8		15
Charge-offs
Recoveries
Ending balance	83	90	83	90
Home equity lines of credit
Beginning balance	224	234	219	236
Acquisition Discount Transfer			1
Provision	(11)	21	(7)	18
Charge-offs
Recoveries				1
Ending balance	213	255	213	255
Residential real estate
Beginning balance	2,872	2,581	2,864	2,328
Acquisition Discount Transfer			11
Provision	163	310	160	571
Charge-offs	(31)		(32)	(10)
Recoveries	1	2	2	4
Ending balance	3,005	2,893	3,005	2,893
Commercial
Beginning balance	3,777	2,776	3,048	2,547
Acquisition Discount Transfer			488
Provision	(149)	211	114	589
Charge-offs	(20)	(26)	(44)	(175)
Recoveries		1	2	1
Ending balance	3,608	2,962	3,608	2,962
Construction of commercial
Beginning balance	127	102	122	80
Acquisition Discount Transfer
Provision	23	12	28	34
Charge-offs
Recoveries
Ending balance	150	114	150	114
Commercial real estate
Beginning balance	3,904	2,878	3,170	2,627
Acquisition Discount Transfer			488
Provision	(126)	223	142	623
Charge-offs	(20)	(26)	(44)	(175)
Recoveries		1	2	1
Ending balance	3,758	3,076	3,758	3,076
Farm land
Beginning balance	47	37	33	32
Acquisition Discount Transfer
Provision		(12)	14	(7)
Charge-offs
Recoveries		7		7
Ending balance	47	32	47	32
Vacant land
Beginning balance	89	134	100	131
Acquisition Discount Transfer
Provision	(14)	(27)	(25)	(24)
Charge-offs
Recoveries
Ending balance	75	107	75	107
Real estate secured
Beginning balance	6,912	5,630	6,167	5,118
Acquisition Discount Transfer			499
Provision	23	494	291	1,163
Charge-offs	(51)	(26)	(76)	(185)
Recoveries	1	10	4	12
Ending balance	6,885	6,108	6,885	6,108
Commercial and industrial
Beginning balance	1,176	1,144	1,158	984
Acquisition Discount Transfer			164
Provision	74	(173)	(54)	(14)
Charge-offs	(97)	(2)	(146)	(12)
Recoveries	14	7	45	18
Ending balance	1,167	976	1,167	976
Municipal
Beginning balance	30	29	12	30
Acquisition Discount Transfer
Provision	17	(11)	35	(12)
Charge-offs
Recoveries
Ending balance	47	18	47	18
Consumer
Beginning balance	81	63	56	81
Acquisition Discount Transfer
Provision	(26)	(9)	11	5
Charge-offs	(5)	(10)	(29)	(55)
Recoveries	3	7	15	20
Ending balance	53	51	53	51
Unallocated
Beginning balance	688	515	438	563
Acquisition Discount Transfer
Provision	6	77	256	29
Charge-offs
Recoveries
Ending balance	694	592	694	592
Totals
Beginning balance	8,887	7,381	7,831	6,776
Acquisition Discount Transfer			663
Provision	94	378	539	1,171
Charge-offs	(153)	(38)	(251)	(252)
Recoveries	18	24	64	50
Ending balance	$ 8,846	$ 7,745	$ 8,846	$ 7,745