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Note 11 - Subordinated Debentures (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jan. 01, 2030
Jan. 01, 2025
Sep. 30, 2025
Sep. 30, 2025
Dec. 31, 2020
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]   Secured Overnight Financing Rate (SOFR) [Member]      
Forecast [Member]          
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]        
Subordinated Debt [Member]          
Debt Instrument, Face Amount         $ 12,000
Interest Expense, Debt     $ 225 $ 225  
Subordinated Debt [Member] | The 2035 Notes [Member]          
Debt Instrument, Face Amount         $ 2,000
Debt Instrument, Interest Rate, Stated Percentage         4.75%
Subordinated Debt [Member] | The 2035 Notes [Member] | Forecast [Member]          
Debt Instrument, Basis Spread on Variable Rate 4.14%        
Subordinated Debt [Member] | The 2030 Notes [Member]          
Debt Instrument, Face Amount         $ 10,000
Debt Instrument, Interest Rate, Stated Percentage         4.75%
Debt Instrument, Basis Spread on Variable Rate   4.52%