Note 2 - Securities - Cost of Restricted Stock (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Total restricted stock	$ 8,484	$ 8,056	[1]
FRB Stock [Member]
Total restricted stock	6,511	6,500
FHLB Stock [Member]
Total restricted stock	$ 1,973	$ 1,556

[1] Derived from audited consolidated financial statements