LOANS - Age analysis of past due loans (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	$ 7,979	$ 5,941
Total Past Due	10,674	10,631
Total Current	1,245,101	1,021,458
Loans	1,249,999	1,029,975
Deferred loan (fees) cost, net	(5,776)	(2,114)
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,305	2,533
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	64	926
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,326	1,231
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	169	181
Total Past Due	315	181
Total Current	245,622	221,697
Loans	245,937	221,878
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	146	0
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	3,110	1,832
Total Past Due	3,813	2,628
Total Current	512,299	456,487
Loans	516,112	459,115
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	371	393
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	82
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	332	321
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	3,126	2,824
Total Past Due	3,712	4,012
Total Current	157,931	71,736
Loans	161,643	75,748
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	586	1,108
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	34
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	46
Commercial Portfolio Segment [Member] | Other Loan [Member] | Loans to individuals & overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	145	155
Total Past Due	165	160
Total Current	7,375	9,853
Loans	7,540	10,013
Commercial Portfolio Segment [Member] | Other Loan [Member] | Loans to individuals & overdrafts [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11	5
Commercial Portfolio Segment [Member] | Other Loan [Member] | Loans to individuals & overdrafts [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9	0
Commercial Portfolio Segment [Member] | Other Loan [Member] | Loans to individuals & overdrafts [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Consumer Portfolio Segment [Member] | Real Estate Loan [Member] | Multi-family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	0	0
Total Past Due		0
Total Current	77,877	69,124
Loans	77,877	69,124
Consumer Portfolio Segment [Member] | Real Estate Loan [Member] | Multi-family residential [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Consumer Portfolio Segment [Member] | Real Estate Loan [Member] | Multi-family residential [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Consumer Portfolio Segment [Member] | Real Estate Loan [Member] | Multi-family residential [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | 1- to- 4 family residential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	971	505
Total Past Due	2,117	3,038
Total Current	195,278	148,659
Loans	197,395	151,697
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | 1- to- 4 family residential real estate loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	97	859
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | 1- to- 4 family residential real estate loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	55	810
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | 1- to- 4 family residential real estate loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	994	864
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | HELOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	458	444
Total Past Due	552	612
Total Current	48,719	43,902
Loans	49,271	44,514
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | HELOC [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	94	168
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | HELOC [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | HELOC [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Unallocated Financing Receivables [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	0	0
Total Past Due		0
Total Current	0	0
Deferred loan (fees) cost, net	(5,776)	(2,114)
Unallocated Financing Receivables [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Unallocated Financing Receivables [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Unallocated Financing Receivables [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 0	$ 0