Note 6 - Allowance for Credit Losses and Credit Quality Information - Provision for Credit Losses (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Loans (1)	[1]	$ 795	$ 1,071
Unfunded commitments(1)	[1]	(82)	0
Total	[2]	$ 713	$ 1,071

[1] The Company adopted ASU 2016-13 as of January 1, 2023. The 2022 amounts presented are calculated under the prior accounting standard.

[2] The Company adopted Accounting Standard Update (ASU) 2016-13 as of January 1, 2023. The 2022 amount presented is calculated under the prior accounting standard.