Note 8 - Borrowings - Components of Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Securities sold under agreements to repurchase	$ 1,006	$ 1,119	[1]
Retail Repurchase Agreements [Member]
Securities sold under agreements to repurchase	$ 1,006	$ 1,119
Retail repurchase agreements	0.05%	0.06%

[1] Derived from audited financial statements