Note 8 - Intangible Assets - Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-lived intangible assets, accumulated amortization	$ (3,517)	$ (3,583)
Goodwill, gross carrying amount	802	802
Goodwill, accumulated impairment	0	0
Goodwill	802	802
Intangible assets (including goodwill), gross carrying amount	7,028	7,371
Intangible assets, unamortized intangible assets	3,511	3,788
Mortgage Servicing Rights [Member]
Finite-lived intangible assets, gross carrying amount	6,226	5,995
Finite-lived intangible assets, accumulated amortization	(3,517)	(3,009)
Finite-lived intangible assets, unamortized intangible assets	$ 2,709	2,986
Core Deposits [Member]
Finite-lived intangible assets, gross carrying amount		574
Finite-lived intangible assets, accumulated amortization		(574)
Finite-lived intangible assets, unamortized intangible assets		$ 0