LOANS AND ALLOWANCE FOR LOAN LOSSES - Impaired loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Recorded Investment
Total	$ 13,673,000	$ 15,054,000
Unpaid Principal Balance
Total	16,637,000	18,100,000
Related Allowance
Total	0	8,000
Average Recorded Investment
Total	14,928,000	13,702,000
Interest Income Recognized
Total	357,000	392,000
Commercial and Industrial [Member]
Recorded Investment
With no related allowance recorded	1,017,000	1,095,000
With an allowance recorded	0	0
Total	1,017,000	1,095,000
Unpaid Principal Balance
With no related allowance recorded	1,017,000	1,095,000
With an allowance recorded	0	0
Total	1,017,000	1,095,000
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	1,052,000	1,082,000
With an allowance recorded	0	0
Total	1,052,000	1,082,000
Interest Income Recognized
With no related allowance recorded	9,000	14,000
With an allowance recorded	0	0
Total	9,000	14,000
Commercial Real Estate
Recorded Investment
With no related allowance recorded	11,803,000	12,438,000
With an allowance recorded	0	485,000
Total	11,803,000	12,923,000
Unpaid Principal Balance
With no related allowance recorded	14,735,000	15,400,000
With an allowance recorded	0	485,000
Total	14,735,000	15,885,000
Related Allowance
With no related allowance recorded	0	0
With an allowance recorded	0	8,000
Total	0	8,000
Average Recorded Investment
With no related allowance recorded	12,571,000	11,463,000
With an allowance recorded	198,000	118,000
Total	12,769,000	11,581,000
Interest Income Recognized
With no related allowance recorded	346,000	371,000
With an allowance recorded	0	5,000
Total	346,000	376,000
Residential Real Estate
Recorded Investment
With no related allowance recorded	853,000	1,036,000
With an allowance recorded	0	0
Total	853,000	1,036,000
Unpaid Principal Balance
With no related allowance recorded	885,000	1,120,000
With an allowance recorded	0	0
Total	885,000	1,120,000
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	1,107,000	1,026,000
With an allowance recorded	0	13,000
Total	1,107,000	1,039,000
Interest Income Recognized
With no related allowance recorded	2,000	1,000
With an allowance recorded	0	1,000
Total	$ 2,000	$ 2,000