FAIR VALUE MEASUREMENTS - FV of Financial instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
FINANCIAL ASSETS: (Carrying Amount)
Cash and due from banks	$ 9,600	$ 8,833
Interest-bearing deposits in other banks	51,738	15,347
Time deposits with other banks	247	247
Restricted investment in bank stocks	1,919	2,247
Net loans	744,161	712,677
Accrued interest receivable	4,361	4,544
FINANCIAL LIABILITIES: (Carrying Amount)
Time deposits	173,092
Short-term borrowings	27,377	19,494
Long-term borrowings	35,000	45,000
Subordinated debentures	25,000	25,000
Accrued interest payable	251	405
Fair Value, Measurements, Nonrecurring [Member]
FINANCIAL ASSETS: (Carrying Amount)
Cash and due from banks	9,600	8,833
Interest-bearing deposits in other banks	51,738	15,347
Time deposits with other banks	247	247
Restricted investment in bank stocks	1,919	2,247
Net loans	744,161	712,677
Mortgage servicing rights	367	262
Accrued interest receivable	4,361	4,544
FINANCIAL LIABILITIES: (Carrying Amount)
Core deposits	904,877	743,660
Time deposits	173,092	193,828
Short-term borrowings	27,377	19,494
Long-term borrowings	35,000	45,000
Subordinated debentures	25,000	25,000
Accrued interest payable	251	405
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS (Carrying Amount)	0	0
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	9,600	8,833
Interest-bearing deposits in other banks	51,738	15,347
Time deposits with other banks	247	253
Restricted investment in bank stocks	1,919	2,247
Net loans	762,914	741,934
Mortgage servicing rights	367	262
Accrued interest receivable	4,361	4,544
FINANCIAL LIABILITIES: (Fair Value)
Demand, savings and other deposits	904,877	743,660
Time deposits	172,897	196,200
Short-term borrowings	27,380	19,498
Long-term borrowings	35,987	47,237
Subordinated debentures	24,384	25,378
Accrued interest payable	251	405
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS (Fair Value)	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
FINANCIAL LIABILITIES: (Carrying Amount)
Subordinated debentures	0
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	9,600	8,833
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 [Member] | Fair Value, Inputs, Level 2 [Member]
FINANCIAL LIABILITIES: (Carrying Amount)
Subordinated debentures	24,384
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	0	0
Interest-bearing deposits in other banks	51,738	15,347
Time deposits with other banks	247	253
Restricted investment in bank stocks	1,919	2,247
Net loans	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	4,361	4,544
FINANCIAL LIABILITIES: (Fair Value)
Demand, savings and other deposits	904,877	743,660
Time deposits	172,897	196,200
Short-term borrowings	27,380	19,498
Long-term borrowings	35,987	47,237
Subordinated debentures		25,378
Accrued interest payable	251	405
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS (Fair Value)	0	0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
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	762,914	741,934
Mortgage servicing rights	367	262
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