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Note 4 - Loans and Allowance for Loan Losses - Recorded Investment in Loans by Risk Category (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
loans $ 566,548 $ 490,830
Pass [Member]    
loans 561,809 485,753
Special Mention [Member]    
loans 1,243 1,587
Substandard [Member]    
loans 2,093 2,163
Doubtful [Member]    
loans 1,403 1,327
Unlikely to be Collected Financing Receivable [Member]    
loans 0 0
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]    
loans 155,938 131,152
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Pass [Member]    
loans 154,429 129,705
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Special Mention [Member]    
loans 0 0
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Substandard [Member]    
loans 765 641
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Doubtful [Member]    
loans 744 806
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member] | Unlikely to be Collected Financing Receivable [Member]    
loans 0 0
Real Estate Mortgage Portfolio Segment [Member] | Land Loan [Member]    
loans 21,997 19,594
Real Estate Mortgage Portfolio Segment [Member] | Land Loan [Member] | Pass [Member]    
loans 21,827 19,369
Real Estate Mortgage Portfolio Segment [Member] | Land Loan [Member] | Special Mention [Member]    
loans 60 61
Real Estate Mortgage Portfolio Segment [Member] | Land Loan [Member] | Substandard [Member]    
loans 59 62
Real Estate Mortgage Portfolio Segment [Member] | Land Loan [Member] | Doubtful [Member]    
loans 51 102
Real Estate Mortgage Portfolio Segment [Member] | Land Loan [Member] | Unlikely to be Collected Financing Receivable [Member]    
loans 0 0
Real Estate Mortgage Portfolio Segment [Member] | Construction Loans [Member]    
loans 42,364 33,491
Real Estate Mortgage Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]    
loans 42,364 33,491
Real Estate Mortgage Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member]    
loans 0 0
Real Estate Mortgage Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member]    
loans 0 0
Real Estate Mortgage Portfolio Segment [Member] | Construction Loans [Member] | Doubtful [Member]    
loans 0 0
Real Estate Mortgage Portfolio Segment [Member] | Construction Loans [Member] | Unlikely to be Collected Financing Receivable [Member]    
loans 0 0
Real Estate Mortgage Portfolio Segment [Member] | Commercial Real Estate Loan [Member]    
loans 161,675 138,141
Real Estate Mortgage Portfolio Segment [Member] | Commercial Real Estate Loan [Member] | Pass [Member]    
loans 159,842 135,608
Real Estate Mortgage Portfolio Segment [Member] | Commercial Real Estate Loan [Member] | Special Mention [Member]    
loans 679 1,203
Real Estate Mortgage Portfolio Segment [Member] | Commercial Real Estate Loan [Member] | Substandard [Member]    
loans 1,073 1,215
Real Estate Mortgage Portfolio Segment [Member] | Commercial Real Estate Loan [Member] | Doubtful [Member]    
loans 81 115
Real Estate Mortgage Portfolio Segment [Member] | Commercial Real Estate Loan [Member] | Unlikely to be Collected Financing Receivable [Member]    
loans 0 0
Commercial Portfolio Segment [Member]    
loans 60,976 51,921
Commercial Portfolio Segment [Member] | Pass [Member]    
loans 60,261 51,353
Commercial Portfolio Segment [Member] | Special Mention [Member]    
loans 388 323
Commercial Portfolio Segment [Member] | Substandard [Member]    
loans 172 245
Commercial Portfolio Segment [Member] | Doubtful [Member]    
loans 155 0
Commercial Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]    
loans 0 0
Consumer Portfolio Segment [Member] | Home Equity and Second Mortgage [Member]    
loans 59,333 55,742
Consumer Portfolio Segment [Member] | Home Equity and Second Mortgage [Member] | Pass [Member]    
loans 58,937 55,438
Consumer Portfolio Segment [Member] | Home Equity and Second Mortgage [Member] | Special Mention [Member]    
loans 0 0
Consumer Portfolio Segment [Member] | Home Equity and Second Mortgage [Member] | Substandard [Member]    
loans 24 0
Consumer Portfolio Segment [Member] | Home Equity and Second Mortgage [Member] | Doubtful [Member]    
loans 372 304
Consumer Portfolio Segment [Member] | Home Equity and Second Mortgage [Member] | Unlikely to be Collected Financing Receivable [Member]    
loans 0 0
Consumer Portfolio Segment [Member] | All Other Consumer Excluding Home Equity and Second Mortgage [Member]    
loans 64,265 60,789
Consumer Portfolio Segment [Member] | All Other Consumer Excluding Home Equity and Second Mortgage [Member] | Pass [Member]    
loans 64,149 60,789
Consumer Portfolio Segment [Member] | All Other Consumer Excluding Home Equity and Second Mortgage [Member] | Special Mention [Member]    
loans 116 0
Consumer Portfolio Segment [Member] | All Other Consumer Excluding Home Equity and Second Mortgage [Member] | Substandard [Member]    
loans 0 0
Consumer Portfolio Segment [Member] | All Other Consumer Excluding Home Equity and Second Mortgage [Member] | Doubtful [Member]    
loans 0 0
Consumer Portfolio Segment [Member] | All Other Consumer Excluding Home Equity and Second Mortgage [Member] | Unlikely to be Collected Financing Receivable [Member]    
loans $ 0 $ 0