v3.26.1
Note 9 - Financial Assets Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale [1] $ 528,007 $ 542,830
US Treasury Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale 19,435 21,583
US Government Agencies Debt Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale 70,786 70,850
US States and Political Subdivisions Debt Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale [2] 87,249 88,787
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale [2] 177,676 182,208
Collateralized Mortgage Obligations [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale 145,102 149,203
Corporate Debt Securities and Money Market Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale 27,759 30,199
Fair Value, Inputs, Level 2 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale [1] 527,958 542,780
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale 19,435 21,583
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale 70,786 70,850
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale [2] 87,249 88,787
Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale [2] 177,676 182,208
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale 145,102 149,203
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities and Money Market Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale 27,710 30,149
Fair Value, Inputs, Level 3 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale [1] 49 50
Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities and Money Market Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Available-for-sale 49 50
Recurring [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Asset fair value measurements 528,007 542,830
Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Asset fair value measurements 527,958 542,780
Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Asset fair value measurements 49 50
Nonrecurring [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Asset fair value measurements 6,184 5,441
Nonrecurring [Member] | Collateral Dependent Loans [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Asset fair value measurements 6,183 5,440
Nonrecurring [Member] | Mortgage Servicing Rights [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Asset fair value measurements 1 1
Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Asset fair value measurements 6,184 5,441
Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Collateral Dependent Loans [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Asset fair value measurements 6,183 5,440
Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage Servicing Rights [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Asset fair value measurements $ 1 $ 1
[1] Includes derivatives designated as fair value hedges.
[2] Includes derivatives designated as fair value hedges.