v3.26.3
Note 8 - Fair Value Measurements and Fair Value of Financial Instruments - Significant Unobservable Inputs for Assets Measured on Nonrecurring Basis (Details)
$ in Thousands
Sep. 30, 2026
USD ($)
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Collateral dependent loans, fair value   $ 33,700  
Fair Value, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member]      
Collateral dependent loans, fair value $ 33,707    
Fair Value, Nonrecurring [Member] | Commercial Portfolio Segment [Member]      
Collateral dependent loans, fair value     $ 693
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member]      
Collateral dependent loans, fair value 33,707    
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member]      
Collateral dependent loans, fair value $ 7,773    
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member] | Minimum [Member]      
Collateral dependent loans, rate (0.01)    
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member] | Maximum [Member]      
Collateral dependent loans, rate 0.15    
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Appraisals of Collateral Value [Member] | Measurement Input, Comparability Adjustment [Member] | Weighted Average [Member]      
Collateral dependent loans, rate (0.017)    
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Valuation, Income Approach [Member] | Measurement Input, Capitalization Rate [Member]      
Collateral dependent loans, fair value $ 25,934    
Collateral dependent loans, rate 8    
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Real Estate Portfolio Segment [Member] | Valuation, Income Approach [Member] | Measurement Input, Vacancy and Collection Loss Rate [Member]      
Collateral dependent loans, rate 3    
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Portfolio Segment [Member]      
Collateral dependent loans, fair value     693
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Appraisals of Collateral Value [Member]      
Collateral dependent loans, fair value     $ 693
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Appraisals of Collateral Value [Member] | Minimum [Member]      
Collateral dependent loans, rate     (0.05)
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Appraisals of Collateral Value [Member] | Maximum [Member]      
Collateral dependent loans, rate     0.15
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Valuation, Market Approach [Member] | Appraisals of Collateral Value [Member] | Weighted Average [Member]      
Collateral dependent loans, rate     0.081