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ALLOWANCE FOR LOAN LOSSES - Loan losses by portfolio segment (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at Beginning of Period $ 12,398,000 $ 11,345,000 $ 9,279,000
Charge-Offs (1,849,000) (294,000) (487,000)
Recoveries 144,000 247,000 178,000
Provision (Credit) 50,000 1,100,000 2,375,000
Balance at End of Period 10,743,000 12,398,000 11,345,000
Commercial.      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at Beginning of Period 3,071,000    
Charge-Offs (97,000)    
Recoveries 4,000    
Provision (Credit) (325,000)    
Balance at End of Period 2,653,000 3,071,000  
Commercial loans secured by non-owner occupied real estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at Beginning of Period 6,392,000    
Charge-Offs (1,390,000)    
Recoveries 54,000    
Provision (Credit) 916,000    
Balance at End of Period 5,972,000 6,392,000  
Commercial loans secured by non-owner occupied real estate | COVID 19      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Provision (Credit) 916,000 968,000 2,200,000
Real estate - residential mortgage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at Beginning of Period 1,590,000    
Charge-Offs (28,000)    
Recoveries 19,000    
Provision (Credit) (201,000)    
Balance at End of Period 1,380,000 1,590,000  
CONSUMER      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at Beginning of Period 113,000    
Charge-Offs (334,000)    
Recoveries 67,000    
Provision (Credit) 239,000    
Balance at End of Period 85,000 113,000  
Allocation for general risk      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at Beginning of Period 1,232,000 1,093,000 924,000
Charge-Offs 0    
Recoveries 0    
Provision (Credit) (579,000) 139,000 169,000
Balance at End of Period 653,000 1,232,000 1,093,000
Commercial | COVID 19      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Provision (Credit) 325,000 (344,000) (372,000)
Commercial | Commercial.      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at Beginning of Period 3,071,000 3,472,000 3,951,000
Charge-Offs   (146,000) (111,000)
Recoveries   89,000 4,000
Provision (Credit)   (344,000) (372,000)
Balance at End of Period 2,653,000 3,071,000 3,472,000
Commercial | Commercial loans secured by non-owner occupied real estate      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at Beginning of Period 6,392,000 5,373,000 3,119,000
Recoveries   51,000 44,000
Provision (Credit)   968,000 2,210,000
Balance at End of Period 5,972,000 6,392,000 5,373,000
Consumer. | Real estate - residential mortgage      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at Beginning of Period 1,590,000 1,292,000 1,159,000
Charge-Offs   (17,000) (233,000)
Recoveries   49,000 62,000
Provision (Credit)   266,000 304,000
Balance at End of Period 1,380,000 1,590,000 1,292,000
Consumer. | CONSUMER      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Balance at Beginning of Period 113,000 115,000 126,000
Charge-Offs   (131,000) (143,000)
Recoveries   58,000 68,000
Provision (Credit)   71,000 64,000
Balance at End of Period $ 85,000 $ 113,000 $ 115,000