Note 9 - Derivative Instruments and Hedging Activities - Notional or Contractual Amounts and Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Notional or contractual amount	$ 12,128	$ 12,278
Derivative assets	0	0
Derivative financial liabilities	179	837
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Notional or contractual amount	4,287	4,388
Derivative assets	0	0
Derivative financial liabilities	23	229
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Notional or contractual amount	7,841	7,890
Derivative assets	0	0
Derivative financial liabilities	$ 156	$ 608