LOANS - Composition of loans receivable by delinquency status (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current
Residential 1-4 family	$ 333,436	$ 314,798
Residential 5+ multifamily	25,546	18,108
Construction of residential 1-4 family	12,035	11,197
Home equity lines of credit	33,493	33,219
Residential real estate	404,510	377,322
Commercial	269,513	244,869
Construction of commercial	11,287	9,730
Commercial real estate	280,800	254,599
Farm land	4,432	4,032
Vacant land	8,847	7,883
Real estate secured	698,589	643,836
Commercial and industrial	150,198	131,991
Municipal	18,608	17,494
Consumer	4,849	4,752
Loans receivable, gross	872,244	798,073
Past due 30-59 days
Residential 1-4 family	370	1,410
Residential 5+ multifamily	229
Construction of residential 1-4 family
Home equity lines of credit	78	75
Residential real estate	677	1,485
Commercial		1,888
Construction of commercial
Commercial real estate		1,888
Farm land		242
Vacant land
Real estate secured	677	3,615
Commercial and industrial	314	131
Municipal
Consumer	16	34
Loans receivable, gross	1,007	3,780
Past due 60-89 days
Residential 1-4 family	33	165
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit		477
Residential real estate	33	642
Commercial	465	758
Construction of commercial
Commercial real estate	465	758
Farm land
Vacant land
Real estate secured	498	1,400
Commercial and industrial	39	218
Municipal
Consumer	2	8
Loans receivable, gross	539	1,626
Past due 90-179 days
Residential 1-4 family	527	156
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit	359
Residential real estate	886	156
Commercial	776
Construction of commercial
Commercial real estate	776
Farm land
Vacant land
Real estate secured	1,662	156
Commercial and industrial		391
Municipal
Consumer
Loans receivable, gross	1,662	547
Past due 180 days and over
Residential 1-4 family	1,017	1,110
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit
Residential real estate	1,017	1,110
Commercial	1,641	1,796
Construction of commercial	257	258
Commercial real estate	1,898	2,054
Farm land
Vacant land
Real estate secured	2,915	3,164
Commercial and industrial	360
Municipal
Consumer
Loans receivable, gross	3,275	3,164
Past due 30 days and over
Residential 1-4 family	1,947	2,841
Residential 5+ multifamily	229
Construction of residential 1-4 family
Home equity lines of credit	437	552
Residential real estate	2,613	3,393
Commercial	2,882	4,442
Construction of commercial	257	258
Commercial real estate	3,139	4,700
Farm land		242
Vacant land
Real estate secured	5,752	8,335
Commercial and industrial	713	740
Municipal
Consumer	18	42
Loans receivable, gross	6,483	9,117
Past due Accruing 90 days and over
Residential 1-4 family
Residential 5+ multifamily
Construction of residential 1-4 family
Home equity lines of credit	359
Residential real estate	359
Commercial
Construction of commercial
Commercial real estate
Farm land
Vacant land
Real estate secured	359
Commercial and industrial		31
Municipal
Consumer
Loans receivable, gross	359	31
Non-accrual
Residential 1-4 family	2,052	2,045
Residential 5+ multifamily	145	151
Construction of residential 1-4 family
Home equity lines of credit	60	66
Residential real estate	2,257	2,262
Commercial	2,418	3,364
Construction of commercial	257	258
Commercial real estate	2,675	3,622
Farm land	230	250
Vacant land
Real estate secured	5,162	6,134
Commercial and industrial	360	470
Municipal
Consumer
Loans receivable, gross	$ 5,522	$ 6,604