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Note 7 - Premises, Equipment, and Leases (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Impairment of Long-Lived Assets to be Disposed of $ 0 $ 781 $ 812
Depreciation, Depletion and Amortization, Total $ 4,150 $ 4,470 4,460
Operating Lease, Weighted Average Discount Rate, Percent 3.28% 3.22%  
Operating Lease, Expense $ 175 $ 182 $ 180
Minimum [Member]      
Lessee, Operating Lease, Remaining Lease Term (Year) 2 years 4 months  
Maximum [Member]      
Lessee, Operating Lease, Remaining Lease Term (Year) 6 years 6 months 7 years 6 months  
Other Assets [Member]      
Operating Lease, Right-of-Use Asset $ 648 $ 741  
Other Liabilities [Member]      
Operating Lease, Liability, Total $ 670 $ 770