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Note 9 - Borrowed Funds - Schedule of Maturities of Long-term Debt (Details) - USD ($)
Mar. 31, 2024
Dec. 31, 2023
Total $ 630,000 $ 637,000
Long-Term Debt [Member]    
2024 17,000  
2025 24,000  
2026 589,000  
2027 0  
2028 0  
Thereafter 0  
Total 630,000  
Subordinated Debt [Member]    
2024 0  
2025 0  
2026 0  
2027 0  
2028 0  
Thereafter 105,000,000  
Total 105,000,000  
Subordinated Debentures Owed To Unconsolidated Subsidiary Trusts [Member]    
2024 0  
2025 0  
2026 0  
2027 0  
2028 0  
Thereafter 19,589,000  
Total $ 19,589,000