LOANS - Risk ratings of the commercial and consumer loan portfolios (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,249,999	$ 1,029,975
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	245,937	221,878
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member] | Very Good [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	193	110
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member] | Good [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,299	8,674
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member] | Acceptable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	26,854	16,249
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member] | Acceptable With Care [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	214,840	196,228
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	582	436
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	169	181
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	516,112	459,115
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member] | Superior [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	212	337
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member] | Very Good [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,624	1,245
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member] | Good [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	71,967	62,643
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member] | Acceptable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	276,479	255,751
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member] | Acceptable With Care [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	156,928	133,190
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,089	1,490
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Commercial real estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,813	4,459
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	161,643	75,748
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member] | Superior [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	96,774	4,014
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member] | Very Good [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	163	349
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member] | Good [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,463	5,976
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member] | Acceptable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	18,612	19,197
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member] | Acceptable With Care [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	35,426	40,579
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	394	242
Commercial Portfolio Segment [Member] | Other Loan [Member] | Commercial and industrial other loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,811	5,391
Commercial Portfolio Segment [Member] | Other Loan [Member] | Loans to individuals & overdrafts [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	7,540	10,013
Commercial Portfolio Segment [Member] | Other Loan [Member] | Loans to individuals & overdrafts [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	7,268	9,727
Commercial Portfolio Segment [Member] | Other Loan [Member] | Loans to individuals & overdrafts [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	272	286
Consumer Portfolio Segment [Member] | Real Estate Loan [Member] | Multi-family residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	77,877	69,124
Consumer Portfolio Segment [Member] | Real Estate Loan [Member] | Multi-family residential [Member] | Good [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,632	4,839
Consumer Portfolio Segment [Member] | Real Estate Loan [Member] | Multi-family residential [Member] | Acceptable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	43,569	41,113
Consumer Portfolio Segment [Member] | Real Estate Loan [Member] | Multi-family residential [Member] | Acceptable With Care [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	27,676	23,172
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | 1- to- 4 family residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	197,395	151,697
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | 1- to- 4 family residential real estate loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	194,067	147,958
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | 1- to- 4 family residential real estate loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,165	1,246
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | 1- to- 4 family residential real estate loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,163	2,493
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | HELOC [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	49,271	44,514
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | HELOC [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	48,173	43,585
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | HELOC [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	222	76
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | HELOC [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 876	$ 853