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Note 5 - Fair Value Measurements - Additional Quantitative Information About Assets Measured at Fair Value on Non-recurring Basis (Details) - Fair Value, Nonrecurring [Member]
$ in Thousands
Sep. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Collateral-dependent loans $ 6,007 $ 3,321
Premises and equipment held for sale 998  
Fair Value, Inputs, Level 3 [Member]    
Collateral-dependent loans 6,007 3,321
Premises and equipment held for sale 998  
Appraisal of Collateral [Member] | Fair Value, Inputs, Level 3 [Member]    
Collateral-dependent loans $ 6,007 $ 3,321
Appraisal of Collateral [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Appraised Value [Member] | Minimum [Member]    
Collateral-dependent loans, range 0.128 0 [1]
Appraisal of Collateral [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Appraised Value [Member] | Maximum [Member]    
Collateral-dependent loans, range 0.292 0.239 [2]
Appraisal of Collateral [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Appraised Value [Member] | Weighted Average [Member]    
Collateral-dependent loans, range 0.252 0.239
Sale Price [Member] | Fair Value, Inputs, Level 3 [Member]    
Premises and equipment held for sale $ 998  
Sale Price [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Adjustments to Selling Price [Member] | Weighted Average [Member]    
Premises and equipment held for sale, rang 0.05  
[1] Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level III inputs that are not identifiable, less any associated allowance.
[2] Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.