Note 10 - Intangible Assets - Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-lived intangible assets, accumulated amortization	$ (3,657)	$ (3,517)
Goodwill, gross carrying amount	802	802
Goodwill, accumulated impairment	0	0
Goodwill	802	802
Intangible assets (including goodwill), gross carrying amount	7,090	7,028
Intangible assets, unamortized intangible assets	3,433	3,511
Mortgage Servicing Rights [Member]
Finite-lived intangible assets, gross carrying amount	6,288	6,226
Finite-lived intangible assets, accumulated amortization	(3,657)	(3,517)
Finite-lived intangible assets, unamortized intangible assets	$ 2,631	$ 2,709