FAIR VALUE MEASUREMENTS - FV of Financial instruments (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
FINANCIAL ASSETS: (Carrying Amount)
Cash and due from banks	$ 9,441	$ 9,600
Interest-bearing deposits in other banks	783	51,738
Time deposits with other banks		247
Restricted investment in bank stocks	5,753	1,919
Net loans	795,660	744,161
Accrued interest receivable	4,473	4,361
FINANCIAL LIABILITIES: (Carrying Amount)
Short-term borrowings	129,723	27,377
Long-term borrowings	25,000	35,000
Subordinated debentures	25,000	25,000
Accrued interest payable	273	251
Fair Value, Measurements, Nonrecurring [Member]
FINANCIAL ASSETS: (Carrying Amount)
Cash and due from banks	9,441	9,600
Interest-bearing deposits in other banks	783	51,738
Time deposits with other banks	0	247
Restricted investment in bank stocks	5,753	1,919
Net loans	795,660	744,161
Mortgage servicing rights	349	367
Accrued interest receivable	4,473	4,361
FINANCIAL LIABILITIES: (Carrying Amount)
Core deposits	832,736	904,877
Time deposits	160,872	173,092
Short-term borrowings	129,723	27,377
Long-term borrowings	25,000	35,000
Subordinated debentures	25,000	25,000
Accrued interest payable	273	251
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS (Carrying Amount)	0
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	9,441	9,600
Interest-bearing deposits in other banks	783	51,738
Time deposits with other banks	0	247
Restricted investment in bank stocks	5,753	1,919
Net loans	774,976	762,914
Mortgage servicing rights	349	367
Accrued interest receivable	4,473	4,361
FINANCIAL LIABILITIES: (Fair Value)
Demand, savings and other deposits	832,736	904,877
Time deposits	156,636	172,897
Short-term borrowings	129,106	27,380
Long-term borrowings	24,598	35,987
Subordinated debentures	22,428	24,384
Accrued interest payable	273	251
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	9,441	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 [Member] | Fair Value, Inputs, Level 2 [Member]
FINANCIAL LIABILITIES: (Carrying Amount)
Subordinated debentures	22,428
FINANCIAL ASSETS: (Fair Value)
Cash and due from banks	0	0
Interest-bearing deposits in other banks	783	51,738
Time deposits with other banks	0	247
Restricted investment in bank stocks	5,753	1,919
Net loans	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	4,473	4,361
FINANCIAL LIABILITIES: (Fair Value)
Demand, savings and other deposits	832,736	904,877
Time deposits	156,636	172,897
Short-term borrowings	129,106	27,380
Long-term borrowings	24,598	35,987
Subordinated debentures		24,384
Accrued interest payable	273	251
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	774,976	762,914
Mortgage servicing rights	349	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