v3.26.1
Note 7 - Fair Value Measurements and Fair Value of Financial Instruments - Significant Unobservable Inputs for Assets Measured on Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member]
$ in Thousands
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Commercial Portfolio Segment [Member]    
Collateral dependent loans, fair value $ 728 $ 693
Commercial Real Estate Portfolio Segment [Member]    
Collateral dependent loans, fair value 9,100  
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member]    
Collateral dependent loans, fair value 728 693
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Appraisals of Collateral Value [Member]    
Collateral dependent loans, fair value $ 728 $ 693
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Appraisals of Collateral Value [Member] | Minimum [Member]    
Collateral dependent loans, rate 0.05 0.05
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Appraisals of Collateral Value [Member] | Maximum [Member]    
Collateral dependent loans, rate 0.15 0.15
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Appraisals of Collateral Value [Member] | Weighted Average [Member]    
Collateral dependent loans, rate 0.081 0.081
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member]    
Collateral dependent loans, fair value $ 9,100  
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member]    
Collateral dependent loans, fair value $ 9,100  
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member] | Minimum [Member]    
Collateral dependent loans, rate 0.05  
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member] | Maximum [Member]    
Collateral dependent loans, rate 0.20  
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member] | Weighted Average [Member]    
Collateral dependent loans, rate 0.076