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Note 11 - Fair Value Measurements - Fair Value of Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details)
$ in Thousands
Sep. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Valuation Technique, Pricing Model [Member]    
Impaired MSR $ 1,327  
Valuation Technique, Pricing Model [Member] | Measurement Input, Discount Rate [Member] | Minimum [Member]    
Mortgage servicing rights, measurement input 0.095  
Valuation Technique, Pricing Model [Member] | Measurement Input, Discount Rate [Member] | Maximum [Member]    
Mortgage servicing rights, measurement input 0.11  
Valuation Technique, Pricing Model [Member] | Measurement Input, Discount Rate [Member] | Weighted Average [Member]    
Mortgage servicing rights, measurement input 0.095  
Valuation Technique, Pricing Model [Member] | Measurement Input, Prepayment Rate [Member] | Minimum [Member]    
Mortgage servicing rights, measurement input 0.081  
Valuation Technique, Pricing Model [Member] | Measurement Input, Prepayment Rate [Member] | Maximum [Member]    
Mortgage servicing rights, measurement input 0.471  
Valuation Technique, Pricing Model [Member] | Measurement Input, Prepayment Rate [Member] | Weighted Average [Member]    
Mortgage servicing rights, measurement input 0.127  
Valuation Technique, Pricing Model [Member] | Measurement Input, Cost to Service [Member] | Minimum [Member]    
Mortgage servicing rights, measurement input  
Valuation Technique, Pricing Model [Member] | Measurement Input, Cost to Service [Member] | Maximum [Member]    
Mortgage servicing rights, measurement input  
Valuation Technique, Pricing Model [Member] | Measurement Input, Cost to Service [Member] | Weighted Average [Member]    
Mortgage servicing rights, measurement input  
Valuation, Market Approach [Member]    
Real estate owned $ 85 $ 505
Valuation, Market Approach [Member] | Measurement Input, Discount Rate [Member] | Minimum [Member]    
Real estate owned measurement input 0.204 0.324
Valuation, Market Approach [Member] | Measurement Input, Discount Rate [Member] | Maximum [Member]    
Real estate owned measurement input 0.204 0.969
Valuation, Market Approach [Member] | Measurement Input, Discount Rate [Member] | Weighted Average [Member]    
Real estate owned measurement input 0.204 0.796
Mortgage Derivative [Member] | Valuation Technique, Pricing Model [Member]    
Mortgage banking derivatives, fair value $ 539 $ 851
Mortgage Derivative [Member] | Valuation Technique, Pricing Model [Member] | Pull Through Rate [Member] | Minimum [Member]    
Mortgage banking derivatives, measurement input 0.131 0.137
Mortgage Derivative [Member] | Valuation Technique, Pricing Model [Member] | Pull Through Rate [Member] | Maximum [Member]    
Mortgage banking derivatives, measurement input 1 1
Mortgage Derivative [Member] | Valuation Technique, Pricing Model [Member] | Pull Through Rate [Member] | Weighted Average [Member]    
Mortgage banking derivatives, measurement input 0.692 0.663