Note 9 - Derivative and Hedging Transactions - Fair Values of Derivative Instruments on the Balance Sheet (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Derivative assets		$ 2,104	$ 363
Derivative Liabilities		931	98
Financial instruments		0	18
Financial instruments		0	18
Cash collateral (1)	[1]	1,946	300
Cash collateral (1)		0	0
Net derivative amounts		158	45
Net derivative amounts		931	80
Designated as Hedging Instrument [Member]
Derivative assets		1,173	271
Derivative Liabilities		0	7
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative Asset, Notional Amount		20,000
Derivative Liability, Notional Amount		0
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Derivative assets		1,173	271
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Liabilities [Member]
Derivative Liabilities		0	7
Not Designated as Hedging Instrument [Member]
Derivative assets		931	92
Derivative Liabilities		931	92
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative Asset, Notional Amount		6,922
Derivative Liability, Notional Amount		6,922
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Derivative assets		931	92
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Liabilities [Member]
Derivative Liabilities		931	92
Not Designated as Hedging Instrument [Member] | Risk Participation Transaction [Member]
Derivative Asset, Notional Amount		2,486
Derivative assets		0	0
Derivative Liabilities		$ 0	$ 0

[1] Other collateral represents the amount that cannot be used to offset our derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. The other collateral consist of securities and is exchanged under bilateral collateral and master netting agreements that allow us to offset the net derivative position with the related collateral. The application of the other collateral cannot reduce the net derivative position below zero. Therefore, excess other collateral, if any, is not reflected above.