LOANS AND ALLOWANCE FOR LOAN LOSSES - Non-performing assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Total non-accrual loans	$ 7,923	$ 7,078
Foreclosed assets held for resale		28
Loans past-due 90 days or more and still accruing interest	75	13
Total non-performing assets	7,998	7,119
Commercial and Industrial [Member]
Total non-accrual loans	724	745
Loans past-due 90 days or more and still accruing interest	75
Commercial Real Estate
Total non-accrual loans	6,046	5,315
Loans past-due 90 days or more and still accruing interest	0
Residential Real Estate
Total non-accrual loans	1,153	1,018
Loans past-due 90 days or more and still accruing interest	$ 0	$ 13