FAIR VALUE MEASUREMENTS - FV of Financial instruments (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
FINANCIAL ASSETS: (Carrying Amount)
Cash and due from banks	$ 8,677	$ 9,600
Interest-bearing deposits in other banks	1,803	51,738
Time deposits with other banks		247
Restricted investment in bank stocks	4,408	1,919
Net loans	836,464	744,161
Accrued interest receivable	4,479	4,361
FINANCIAL LIABILITIES: (Carrying Amount)
Short-term borrowings	94,748	27,377
Long-term borrowings	25,000	35,000
Subordinated debentures	25,000	25,000
Accrued interest payable	573	251
Fair Value Measurements, Nonrecurring
FINANCIAL ASSETS: (Carrying Amount)
Cash and due from banks	8,677	9,600
Interest-bearing deposits in other banks	1,803	51,738
Time deposits with other banks	0	247
Restricted investment in bank stocks	4,408	1,919
Net loans	836,464	744,161
Mortgage servicing rights	327	367
Accrued interest receivable	4,479	4,361
FINANCIAL LIABILITIES: (Carrying Amount)
Core deposits	899,267	904,877
Time deposits	159,042	173,092
Short-term borrowings	94,748	27,377
Long-term borrowings	25,000	35,000
Subordinated debentures	25,000	25,000
Accrued interest payable	573	251
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS (Carrying Amount)	0
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	8,677	9,600
Interest-bearing deposits in other banks	1,803	51,738
Time deposits with other banks	0	247
Restricted investment in bank stocks	4,408	1,919
Net loans	792,912	762,914
Mortgage servicing rights	327	367
Accrued interest receivable	4,479	4,361
FINANCIAL LIABILITIES: (Fair Value)
Demand, savings and other deposits	899,267	904,877
Time deposits	153,246	172,897
Short-term borrowings	94,410	27,380
Long-term borrowings	24,058	35,987
Subordinated debentures	22,019	24,384
Accrued interest payable	573	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	8,677	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	22,019
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	0	0
Interest-bearing deposits in other banks	1,803	51,738
Time deposits with other banks	0	247
Restricted investment in bank stocks	4,408	1,919
Net loans	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	4,479	4,361
FINANCIAL LIABILITIES: (Fair Value)
Demand, savings and other deposits	899,267	904,877
Time deposits	153,246	172,897
Short-term borrowings	94,410	27,380
Long-term borrowings	24,058	35,987
Subordinated debentures		24,384
Accrued interest payable	573	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	792,912	762,914
Mortgage servicing rights	327	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