Note 9 - Allowance for Credit Losses and Credit Quality Information - Provision for Credit Losses (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Loans (1)	[1]	$ (32)	$ 296
Unfunded commitments		24	0
Total	[2]	$ (8)	$ 296

[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.