LOANS AND ALLOWANCE FOR LOAN LOSSES - Additional Information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2019 USD ($) loan	Dec. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) loan
Loans Receivable Held-for-sale, Amount	$ 12,274,000		$ 12,274,000		$ 2,292,000
Interest rate			1.00%
Number of loans funded | loan			490
Loans for which payment relief has been requested	$ 31,729,000		$ 31,729,000
Maximum loan to value ratio with PMI	95.00%		95.00%
Loan Payments, Delinquency Period, Beyond Which Loans are Considered Past Due			10 days
Loan Payments, Delinquency Period, at which time Delinquency Notice is Automatically Generated			10 or 15 days
Foreclosed Assets Held For Resale	$ 88,000		$ 88,000		119,000
Foreclosed Assets Held for Resale Represented by Land	38,000		38,000		38,000
Foreclosed Assets Held for Resale Represented by Residential Real Estate	50,000		50,000
Foreclosed Assets Held for Resale Represented by Commercial Real Estate					81,000
Financing Receivable, Modifications, Recorded Investment	8,807,000		8,807,000		8,678,000
Financing Receivable, Modifications, Unfunded Commitments			0		0
Modified value of TDR	$ 366,000		$ 525,000
Number of contracts | loan	4	0	7	0
Impaired Financing Receivable Related Allowance Attributable to TDR			$ 0		1,000
Impaired Financing Receivable, Interest Income, Accrual Method	$ 97,000	$ 108,000	262,000	$ 393,000
Impaired Financing Receivable Interest Income Non-accrual Method	0	$ 0	5,000	$ 5,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	366,000		525,000
Government Guaranteed Loans
Loans	$ 5,215,000		$ 5,215,000		6,150,000
Minimum [Member]
Term of loan			2 years
Maximum [Member]
Term of loan			5 years
Commercial Real Estate [Member] | Maximum [Member]
Term of loan offering			20 years
Maximum loan to value ratio			80.00%
TDRs [Member]
Number of loans modified as TDRs during the past twelve months | loan	0	0		0
Irrevocable Letter of credit [Member] | Loan to a Developer of a Residential Sub-Division [Member]
Loans and Leases Receivable, Impaired, Commitment to Lend	$ 1,249,000		$ 1,249,000		1,249,000
Unfunded Loan Commitment [Member]
Reserve For Unfunded Lending Commitments	$ 138,000		$ 138,000		117,000
Loan Restructuring Modification [Member]
Count | loan	189		189			490
Investment as of September 30, 2020	$ 74,935,000		$ 74,935,000			$ 163,695,000
Term Modification
Number of contracts | loan	1		1
Payment Modification
Number of contracts | loan	3		6
Commercial and Industrial [Member]
Tax free loans	$ 7,322,000		$ 7,322,000		17,848,000
Modified value of TDR	$ 42,000		$ 42,000
Number of contracts | loan	2		2
Financing Receivable Modification Not In Compliance Of Terms			$ 751,000	$ 3,000
Number of loans not in compliance with restructure | loan	3	1	3	1
Impaired Financing Receivable, Interest Income, Accrual Method	$ 4,000	$ 13,000	$ 12,000	$ 40,000
Government Guaranteed Loans.	5,215,000		5,215,000		6,150,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	42,000		42,000
Commercial and Industrial [Member] | Paycheck Protection Program Loans
Loan funded under paycheck protection program	$ 31,729,000		$ 31,729,000		0
Commercial and Industrial [Member] | Loan Restructuring Modification [Member]
Count | loan	41		41			66
Investment as of September 30, 2020	$ 7,251,000		$ 7,251,000			$ 11,540,000
Commercial and Industrial [Member] | Term Modification
Number of contracts | loan	1		1
Commercial and Industrial [Member] | Payment Modification
Number of contracts | loan	1		1
Commercial Real Estate [Member]
Tax free loans	$ 1,885,000		$ 1,885,000		2,007,000
Modified value of TDR	$ 324,000		$ 483,000
Number of contracts | loan	2		5
Financing Receivable Modification Not In Compliance Of Terms			$ 1,288,000	$ 661,000
Number of loans not in compliance with restructure | loan	9	9	9	9
Impaired Financing Receivable, Interest Income, Accrual Method	$ 93,000	$ 93,000	$ 248,000	$ 346,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 324,000		$ 483,000
Commercial Real Estate [Member] | TDRs [Member]
Number of loans modified as TDRs during the past twelve months | loan			2
Financing Receivable Modification Experienced Payment Defaults			$ 62,000
Commercial Real Estate [Member] | Loan Restructuring Modification [Member]
Count | loan	142		142			325
Investment as of September 30, 2020	$ 66,192,000		$ 66,192,000			$ 143,886,000
Commercial Real Estate [Member] | Term Modification
Number of contracts | loan	0		0
Commercial Real Estate [Member] | Payment Modification
Number of contracts | loan	2		5
Residential Real Estate [Member]
Consumer Mortgage Loans Secured by Residential Real Estate in Process of Foreclosure	$ 971,000		$ 971,000		$ 617,000
Impaired Financing Receivable, Interest Income, Accrual Method	$ 0	$ 2,000	$ 2,000	$ 7,000
Residential Real Estate [Member] | Maximum [Member]
Term of loan offering			20 years
Residential Real Estate [Member] | Home Equity Term Loans [Member] | Maximum [Member]
Term of loan offering			15 years
Residential Real Estate [Member] | Residential Mortgage [Member] | Originated For Resale [Member]
Loans held for sale term	30 years		30 years
Residential Real Estate [Member] | Residential Mortgage [Member] | Originated For Resale [Member] | Maximum [Member]
Term of loan offering			30 years
Maximum loan to value ratio			80.00%
Residential Real Estate [Member] | Home Equity Loan [Member] | Maximum [Member]
Maximum loan to value ratio			80.00%
Residential Real Estate [Member] | Home Equity Line of Credit [Member] | Maximum [Member]
Maximum loan to value ratio			80.00%
Residential Real Estate [Member] | Home Equity Line of Credit [Member] | Home Equity Term Loans [Member] | Maximum [Member]
Term of loan offering			20 years
Residential Real Estate [Member] | Loan Restructuring Modification [Member]
Count | loan	6		6			81
Investment as of September 30, 2020	$ 1,492,000		$ 1,492,000			$ 8,143,000
Consumer [Member] | Loan Restructuring Modification [Member]
Count | loan	0		0			18
Investment as of September 30, 2020	$ 0		$ 0			$ 126,000