LOANS - Changes in allowance for loan losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Residential 1-4 family
Beginning balance	$ 2,149	$ 1,862
Acquisition Discount Transfer	10
Provision	(180)	129
Charge-offs		(10)
Recoveries	1	1
Ending balance	1,980	1,982
Residential 5+ multifamily
Beginning balance	413	155
Acquisition Discount Transfer
Provision	53	61
Charge-offs
Recoveries
Ending balance	466	216
Construction of residential 1-4 family
Beginning balance	83	75
Acquisition Discount Transfer
Provision	(6)	(1)
Charge-offs
Recoveries
Ending balance	77	74
Home equity lines of credit
Beginning balance	219	236
Acquisition Discount Transfer	1
Provision	(11)	(3)
Charge-offs
Recoveries
Ending balance	209	233
Residential real estate
Beginning balance	2,864	2,328
Acquisition Discount Transfer	11
Provision	(144)	186
Charge-offs		(10)
Recoveries	1	1
Ending balance	2,732	2,505
Commercial
Beginning balance	3,048	2,547
Acquisition Discount Transfer	488
Provision	276	119
Charge-offs	(9)
Recoveries
Ending balance	3,803	2,666
Construction of commercial
Beginning balance	122	80
Acquisition Discount Transfer
Provision	21	13
Charge-offs
Recoveries
Ending balance	143	93
Commercial real estate
Beginning balance	3,170	2,627
Acquisition Discount Transfer	488
Provision	297	132
Charge-offs	(9)
Recoveries
Ending balance	3,946	2,759
Farm land
Beginning balance	33	32
Acquisition Discount Transfer
Provision	14	1
Charge-offs
Recoveries
Ending balance	47	33
Vacant land
Beginning balance	100	131
Acquisition Discount Transfer
Provision	(11)
Charge-offs
Recoveries
Ending balance	89	131
Real estate secured
Beginning balance	6,167	5,118
Acquisition Discount Transfer	499
Provision	156	319
Charge-offs	(9)	(10)
Recoveries	1	1
Ending balance	6,814	5,428
Commercial and industrial
Beginning balance	1,158	984
Acquisition Discount Transfer	164
Provision	(61)	(42)
Charge-offs	(30)	(9)
Recoveries	2	5
Ending balance	1,233	938
Municipal
Beginning balance	12	30
Acquisition Discount Transfer
Provision	2
Charge-offs
Recoveries
Ending balance	14	30
Consumer
Beginning balance	56	81
Acquisition Discount Transfer
Provision	(3)	12
Charge-offs	(6)	(40)
Recoveries	4	8
Ending balance	51	61
Unallocated
Beginning balance	438	563
Acquisition Discount Transfer
Provision	200	38
Charge-offs
Recoveries
Ending balance	638	601
Totals
Beginning balance	7,831	6,776
Acquisition Discount Transfer	663
Provision	294	327
Charge-offs	(45)	(59)
Recoveries	7	14
Ending balance	$ 8,750	$ 7,058