LOANS AND ALLOWANCE FOR LOAN LOSSES - Impaired loans (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Recorded Investment
Total	$ 13,373,000		$ 13,673,000
Unpaid Principal Balance
Total	16,337,000		16,637,000
Related Allowance
Total			0
Average Recorded Investment
Total	13,560,000	$ 14,996,000
Interest Income Recognized
Total	74,000	96,000
Commercial and Industrial [Member]
Recorded Investment
With no related allowance recorded	1,005,000		1,017,000
With an allowance recorded	0		0
Total	1,005,000		1,017,000
Unpaid Principal Balance
With no related allowance recorded	1,005,000		1,017,000
With an allowance recorded	0		0
Total	1,005,000		1,017,000
Related Allowance
With no related allowance recorded	0		0
With an allowance recorded	0		0
Total	0		0
Average Recorded Investment
With no related allowance recorded	1,010,000	1,085,000
With an allowance recorded	0	0
Total	1,010,000	1,085,000
Interest Income Recognized
With no related allowance recorded	2,000	2,000
With an allowance recorded	0	0
Total	2,000	2,000
Commercial Real Estate
Recorded Investment
With no related allowance recorded	11,519,000		11,803,000
Total	11,519,000		11,803,000
Unpaid Principal Balance
With no related allowance recorded	14,451,000		14,735,000
Total	14,451,000		14,735,000
Related Allowance
With no related allowance recorded	0		0
With an allowance recorded			0
Total			0
Average Recorded Investment
With no related allowance recorded	11,699,000	12,376,000
With an allowance recorded	0	485,000
Total	11,699,000	12,861,000
Interest Income Recognized
With no related allowance recorded	72,000	93,000
With an allowance recorded	0	0
Total	72,000	93,000
Residential Real Estate
Recorded Investment
With no related allowance recorded	849,000		853,000
With an allowance recorded	0		0
Total	849,000		853,000
Unpaid Principal Balance
With no related allowance recorded	881,000		885,000
With an allowance recorded	0		0
Total	881,000		885,000
Related Allowance
With no related allowance recorded	0		0
With an allowance recorded	0		0
Total			$ 0
Average Recorded Investment
With no related allowance recorded	851,000	1,050,000
With an allowance recorded	0	0
Total	851,000	1,050,000
Interest Income Recognized
With no related allowance recorded	0	1,000
With an allowance recorded	0	0
Total	$ 0	$ 1,000