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Note 8 - Commitment and Contingencies - Outstanding Loan Commitments, Unused Lines of Credit, and Letters of Credit (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Letter of Credit [Member]    
Outstanding loan commitments, unused lines of credit, and letters of credit $ 1,339,391 $ 1,403,956
Loan Origination Commitments [Member]    
Outstanding loan commitments, unused lines of credit, and letters of credit 35,925,212 13,975,917
Unused lines of Credit [Member]    
Outstanding loan commitments, unused lines of credit, and letters of credit 58,006,480 37,550,783
Unused lines of Credit [Member] | Home Equity Loan [Member]    
Outstanding loan commitments, unused lines of credit, and letters of credit 11,395,790 12,086,758
Unused lines of Credit [Member] | Commercial Lines [Member]    
Outstanding loan commitments, unused lines of credit, and letters of credit 46,610,690 25,464,025
Construction and Land Development [Member] | Loan Origination Commitments [Member]    
Outstanding loan commitments, unused lines of credit, and letters of credit 8,575,337 911,500
Commercial Portfolio Segment [Member] | Loan Origination Commitments [Member]    
Outstanding loan commitments, unused lines of credit, and letters of credit 17,877,375 398,046
Commercial Real Estate Portfolio Segment [Member] | Loan Origination Commitments [Member]    
Outstanding loan commitments, unused lines of credit, and letters of credit 7,277,500 9,264,000
Residential Portfolio Segment [Member] | Loan Origination Commitments [Member]    
Outstanding loan commitments, unused lines of credit, and letters of credit $ 2,195,000 $ 3,402,371