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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
Mar. 31, 2020
Dec. 31, 2019
Notional or contractual amount $ 17,187 $ 17,432
Derivative assets
Derivative liabilities 1,268 510
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]    
Notional or contractual amount 17,187 17,432
Derivative assets
Derivative liabilities $ 1,268 $ 510