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Note 11 - Derivative Instruments and Hedging Activities - Notional or Contractual Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Notional or contractual amount $ 3,557 $ 3,983
Derivative assets 136 199
Derivative liabilities 0 0
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]    
Notional or contractual amount 3,557 3,983
Derivative assets 136 199
Derivative liabilities 0 0
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]    
Notional or contractual amount 0 0
Derivative assets 0 0
Derivative liabilities $ 0 $ 0