LOANS - Changes in allowance for loan losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Residential 1-4 family
Beginning balance	$ 2,706	$ 1,980	$ 2,393	$ 2,149
Acquisition Discount Transfer				10
Provision	342	95	647	(85)
Charge-offs		(1)		(1)
Recoveries			8	1
Ending balance	3,048	2,074	3,048	2,074
Residential 5+ multifamily
Beginning balance	508	466	446	413
Acquisition Discount Transfer
Provision	122	29	185	82
Charge-offs	(41)		(42)
Recoveries
Ending balance	589	495	589	495
Construction of residential 1-4 family
Beginning balance	87	77	75	83
Acquisition Discount Transfer
Provision		2	12	(4)
Charge-offs
Recoveries
Ending balance	87	79	87	79
Home equity lines of credit
Beginning balance	278	209	197	219
Acquisition Discount Transfer				1
Provision	5	15	81	4
Charge-offs
Recoveries
Ending balance	283	224	283	224
Residential real estate
Beginning balance	3,579	2,732	3,111	2,864
Acquisition Discount Transfer				11
Provision	469	141	930	(3)
Charge-offs	(41)	(1)	(42)	(1)
Recoveries			8	1
Ending balance	4,007	2,872	4,007	2,872
Commercial
Beginning balance	4,519	3,803	3,742	3,048
Acquisition Discount Transfer				488
Provision	645	(13)	1,402	262
Charge-offs	(4)	(14)	(3)	(23)
Recoveries		1	19	2
Ending balance	5,160	3,777	5,160	3,777
Construction of commercial
Beginning balance	126	143	104	122
Acquisition Discount Transfer
Provision	79	(16)	101	5
Charge-offs
Recoveries
Ending balance	205	127	205	127
Commercial real estate
Beginning balance	4,645	3,946	3,846	3,170
Acquisition Discount Transfer				488
Provision	724	(29)	1,503	267
Charge-offs	(4)	(14)	(3)	(23)
Recoveries		1	19	2
Ending balance	5,365	3,904	5,365	3,904
Farm land
Beginning balance	52	47	47	33
Acquisition Discount Transfer
Provision	8		13	14
Charge-offs
Recoveries
Ending balance	60	47	60	47
Vacant land
Beginning balance	144	89	71	100
Acquisition Discount Transfer
Provision	38		111	(11)
Charge-offs
Recoveries
Ending balance	182	89	182	89
Real estate secured
Beginning balance	8,420	6,814	7,075	6,167
Acquisition Discount Transfer				499
Provision	1,239	112	2,557	267
Charge-offs	(45)	(15)	(45)	(24)
Recoveries		1	27	3
Ending balance	9,614	6,912	9,614	6,912
Commercial real estate
Beginning balance	1,071	1,233	1,145	1,158
Acquisition Discount Transfer				164
Provision	444	(67)	370	(127)
Charge-offs		(19)		(50)
Recoveries		29		31
Ending balance	1,515	1,176	1,515	1,176
Municipal
Beginning balance	53	14	46	12
Acquisition Discount Transfer
Provision	(17)	16	(10)	18
Charge-offs
Recoveries
Ending balance	36	30	36	30
Consumer
Beginning balance	102	51	60	56
Acquisition Discount Transfer
Provision	(20)	40	32	37
Charge-offs	(13)	(18)	(25)	(24)
Recoveries	5	8	7	12
Ending balance	74	81	74	81
Unallocated
Beginning balance	972	638	569	438
Acquisition Discount Transfer
Provision	160	50	563	250
Charge-offs
Recoveries
Ending balance	1,132	688	1,132	688
Total
Beginning balance	10,618	8,750	8,895	7,831
Acquisition Discount Transfer				663
Provision	1,806	151	3,512	445
Charge-offs	(58)	(52)	(70)	(98)
Recoveries	5	38	34	46
Ending balance	$ 12,371	$ 8,887	$ 12,371	$ 8,887