Annual report [Section 13 and 15(d), not S-K Item 405]

Note 1 - Summary of Significant Accounting Policies (Details Textual)

v3.25.1
Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Number of Reporting Units 1  
Number of Operating Segments 1  
Cash Accounts [Member]    
Cash, Uninsured Amount $ 6.8  
Cash Held by FRB and FHLB [Member]    
Cash, Uninsured Amount 46.2  
Asset Pledged as Collateral [Member]    
Financial Instruments, Owned, at Fair Value 326.5 $ 324.1
Asset Pledged as Collateral [Member] | Derivative [Member]    
Financial Instruments, Owned, at Fair Value $ 5.1  
Maximum [Member] | Premises and Equipment [Member]    
Property, Plant and Equipment, Useful Life (Year) 39 years  
Maximum [Member] | Furniture and Equipment [Member]    
Property, Plant and Equipment, Useful Life (Year) 10 years  
Minimum [Member] | Premises and Equipment [Member]    
Property, Plant and Equipment, Useful Life (Year) 15 years  
Minimum [Member] | Furniture and Equipment [Member]    
Property, Plant and Equipment, Useful Life (Year) 2 years  
Residential Portfolio Segment [Member] | Maximum [Member]    
Financing Receivable, Loan Term (Year) 30 years  
Home Equity Portfolio Segment [Member] | Maximum [Member]    
Financing Receivable, Loan Term (Year) 20 years  
Financing Receivable, Limit on Credit Extension by Property Equity, Percentage 90.00%  
Commercial Real Estate Portfolio Segment [Member] | Maximum [Member]    
Financing Receivable, Loan Term (Year) 10 years  
Financing Receivable, Loan-to-Value Ratio Limited by Cost of Appraised Value, Percentage 80.00%  
Financing Receivable, Contingency, Cash Flows Required in Excess of Debt Service Obligations, Percentage 120.00%  
Construction and Land Development Portfolio Segment [Member] | Maximum [Member]    
Financing Receivable, Loan Term (Year) 24 months  
Financing Receivable, Limit on Credit Extension by Property Equity, Percentage 80.00%  
Construction and Land Development Portfolio Segment [Member] | Minimum [Member]    
Financing Receivable, Loan Term (Year) 9 months  
Consumer Portfolio Segment [Member] | Maximum [Member]    
Financing Receivable, Loan Term (Year) 7 years  
Manufactured Homes Portfolio Segment [Member] | Maximum [Member]    
Financing Receivable, Loan Term (Year) 25 years