Note 3 - Loans - Accretable Yield on Acquired Impaired Loans (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2022	Dec. 31, 2021
Balance		$ 4,902	$ 6,513
Accretion		(1,808)	(5,292)
Reclassification from nonaccretable difference		835	2,780
Other changes, net (1)	[1]	(273)	901
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield		$ 3,656	$ 4,902

[1] This line item represents changes in the cash flows expected to be collected due to the impact of non-credit changes such as prepayment assumptions, changes in interest rates on variable rate acquired impaired loans, and discounted payoffs that occurred in the period.