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Note 2 - Debt Securities - Summary of Securities in Continuous Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Gross Unrealized Losses, Less Than Twelve Months, AFS $ (5,731) $ (782)
Fair Value, Less Than Twelve Months, AFS 91,762 39,555
Gross Unrealized Losses, Over Twelve Months, AFS (7,630) (7)
Fair Value, Over Twelve Months, AFS 37,674 1,430
Gross Unrealized Losses, Less Than Twelve Months, Held-to-maturity (1,888)  
Fair Value, Less Than Twelve Months, held-to-maturity 9,917  
Gross Unrealized Losses, Over Twelve Months, held-to-maturity 0  
Fair Value, Over Twelve Months, Held-to-maturity 0  
US Treasury and Government [Member]    
Gross Unrealized Losses, Less Than Twelve Months, AFS (1,384) (14)
Fair Value, Less Than Twelve Months, AFS 40,926 2,919
Gross Unrealized Losses, Over Twelve Months, AFS (835) 0
Fair Value, Over Twelve Months, AFS 4,979 0
US States and Political Subdivisions Debt Securities [Member]    
Gross Unrealized Losses, Less Than Twelve Months, AFS (999) (240)
Fair Value, Less Than Twelve Months, AFS 11,436 8,429
Gross Unrealized Losses, Over Twelve Months, AFS (1,875) 0
Fair Value, Over Twelve Months, AFS 8,028 0
Gross Unrealized Losses, Less Than Twelve Months, Held-to-maturity (1,695)  
Fair Value, Less Than Twelve Months, held-to-maturity 7,520  
Gross Unrealized Losses, Over Twelve Months, held-to-maturity 0  
Fair Value, Over Twelve Months, Held-to-maturity 0  
Collateralized Mortgage-Backed Securities [Member]    
Gross Unrealized Losses, Less Than Twelve Months, AFS (3,246) (528)
Fair Value, Less Than Twelve Months, AFS 36,939 28,207
Gross Unrealized Losses, Over Twelve Months, AFS (4,885) 0
Fair Value, Over Twelve Months, AFS 23,563 0
Gross Unrealized Losses, Less Than Twelve Months, Held-to-maturity (193)  
Fair Value, Less Than Twelve Months, held-to-maturity 2,397  
Gross Unrealized Losses, Over Twelve Months, held-to-maturity 0  
Fair Value, Over Twelve Months, Held-to-maturity 0  
Asset-Backed Securities [Member]    
Gross Unrealized Losses, Less Than Twelve Months, AFS (102) 0
Fair Value, Less Than Twelve Months, AFS 2,461 0
Gross Unrealized Losses, Over Twelve Months, AFS (35) (7)
Fair Value, Over Twelve Months, AFS $ 1,104 $ 1,430