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Note 7 - Premises, Equipment, and Leases (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Impairment of Long-Lived Assets to be Disposed of $ 0 $ 0 $ 0
Depreciation, Depletion and Amortization $ 4,350 $ 3,950 4,150
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other Assets Other Assets  
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Interest, Taxes And Other Liabilities Interest, Taxes And Other Liabilities  
Operating Lease, Right-of-Use Asset $ 489 $ 594  
Operating Lease Liability, Total $ 515 $ 620  
Operating Lease, Weighted Average Discount Rate, Percent 3.39% 3.24%  
Operating Lease, Expense $ 178 $ 171 $ 175
Minimum [Member]      
Lessee, Operating Lease, Remaining Lease Term (Year) 3 years 1 year  
Maximum [Member]      
Lessee, Operating Lease, Remaining Lease Term (Year) 4 years 6 months 5 years 6 months