Note 8 - Intangible Assets - Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Finite-lived intangible assets, accumulated amortization	$ (3,583)	$ (3,138)
Goodwill, gross carrying amount	802	802
Goodwill, accumulated impairment	0	0
Goodwill	802	802
Intangible assets (including goodwill), gross carrying amount	7,371	7,230
Intangible assets, unamortized intangible assets	3,788	4,092
Mortgage Servicing Rights [Member]
Finite-lived intangible assets, gross carrying amount	5,995	5,854
Finite-lived intangible assets, accumulated amortization	(3,009)	(2,574)
Finite-lived intangible assets, unamortized intangible assets	2,986	3,280
Core Deposits [Member]
Finite-lived intangible assets, gross carrying amount	574	574
Finite-lived intangible assets, accumulated amortization	(574)	(564)
Finite-lived intangible assets, unamortized intangible assets	$ 0	$ 10