FAIR VALUE MEASUREMENTS - FV of Financial instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
FINANCIAL ASSETS: (Carrying Amount)
Cash and due from banks	$ 9,441	$ 9,600
Interest-bearing deposits in other banks	1,297	51,738
Time deposits with other banks	0	247
Restricted investment in bank stocks	7,136	1,919
Net loans	850,195	744,161
Accrued interest receivable	4,391	4,361
FINANCIAL LIABILITIES: (Carrying Amount)
Time deposits	166,100
Short-term borrowings	153,418	27,377
Long-term borrowings	25,000	35,000
Subordinated debentures	25,000	25,000
Accrued interest payable	563	251
Fair Value Measurements, Nonrecurring
FINANCIAL ASSETS: (Carrying Amount)
Cash and due from banks	9,441	9,600
Interest-bearing deposits in other banks	1,297	51,738
Time deposits with other banks	0	247
Restricted investment in bank stocks	7,136	1,919
Net loans	850,195	744,161
Mortgage servicing rights	319	367
Accrued interest receivable	4,391	4,361
FINANCIAL LIABILITIES: (Carrying Amount)
Core deposits	827,399	904,877
Time deposits	166,100	173,092
Short-term borrowings	153,418	27,377
Long-term borrowings	25,000	35,000
Subordinated debentures	25,000	25,000
Accrued interest payable	563	251
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS (Carrying Amount)	0	0
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	9,441	9,600
Interest-bearing deposits in other banks	1,297	51,738
Time deposits with other banks	0	247
Restricted investment in bank stocks	7,136	1,919
Net loans	810,104	762,914
Mortgage servicing rights	319	367
Accrued interest receivable	4,391	4,361
FINANCIAL LIABILITIES: (Fair Value)
Demand, savings and other deposits	827,399	904,877
Time deposits	160,472	172,897
Short-term borrowings	153,209	27,380
Long-term borrowings	24,090	35,987
Subordinated debentures	22,365	24,384
Accrued interest payable	563	251
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS (Fair Value)	0	0
Fair Value Measurements, Nonrecurring | Fair Value, Inputs, Level 1
FINANCIAL LIABILITIES: (Carrying Amount)
Subordinated debentures	0
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	9,441	9,600
Interest-bearing deposits in other banks	0	0
Time deposits with other banks	0	0
Restricted investment in bank stocks	0	0
Net loans	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	0	0
FINANCIAL LIABILITIES: (Fair Value)
Demand, savings and other deposits	0	0
Time deposits	0	0
Short-term borrowings	0	0
Long-term borrowings	0	0
Subordinated debentures		0
Accrued interest payable	0	0
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS (Fair Value)	0	0
Fair Value Measurements, Nonrecurring | Fair Value, Inputs, Level 2
FINANCIAL LIABILITIES: (Carrying Amount)
Subordinated debentures	22,365
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	0	0
Interest-bearing deposits in other banks	1,297	51,738
Time deposits with other banks	0	247
Restricted investment in bank stocks	7,136	1,919
Net loans	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	4,391	4,361
FINANCIAL LIABILITIES: (Fair Value)
Demand, savings and other deposits	827,399	904,877
Time deposits	160,472	172,897
Short-term borrowings	153,209	27,380
Long-term borrowings	24,090	35,987
Subordinated debentures		24,384
Accrued interest payable	563	251
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS (Fair Value)	0	0
Fair Value Measurements, Nonrecurring | Fair Value, Inputs, Level 3
FINANCIAL LIABILITIES: (Carrying Amount)
Subordinated debentures	0
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	0	0
Interest-bearing deposits in other banks	0	0
Time deposits with other banks	0	0
Restricted investment in bank stocks	0	0
Net loans	810,104	762,914
Mortgage servicing rights	319	367
Accrued interest receivable	0	0
FINANCIAL LIABILITIES: (Fair Value)
Demand, savings and other deposits	0	0
Time deposits	0	0
Short-term borrowings	0	0
Long-term borrowings	0	0
Subordinated debentures		0
Accrued interest payable	0	0
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS (Fair Value)	$ 0	$ 0