v3.26.1
Note 3 - Investment Securities (Details Textual)
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Proceeds from Sale of Debt Securities, Available-for-Sale $ 4,873,000 $ 23,948,000 $ 4,873,000 $ 27,315,000  
Debt Securities, Available-for-Sale, Realized Gain 0 93,000 0 93,000  
Debt Securities, Available-for-Sale, Realized Loss $ 112,000 $ 129,000 $ 112,000 $ 182,000  
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions 166   166    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months $ 249,414,000   $ 249,414,000   $ 57,763,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ 3,148,000   $ 3,148,000   138,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions 315   315    
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer $ 255,399,000   $ 255,399,000   301,152,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 26,065,000   26,065,000   25,276,000
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0   0   0
Asset Pledged as Collateral [Member] | Public Deposits or Other Purposes [Member]          
Debt Securities $ 90,604,000   $ 90,604,000   $ 95,479,000