Note 2 - Securities - Cost of Restricted Stock (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Total restricted stock	$ 9,319	$ 12,651	[1]
FRB Stock [Member]
Total restricted stock	6,556	6,545
FHLB Stock [Member]
Total restricted stock	$ 2,763	$ 6,106

[1] Derived from audited consolidated financial statements