Note 7 - Goodwill and Other Intangible Assets - Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2022
Balance, goodwill	$ 85,048	$ 85,018
Balance, intangibles	3,367
Amortization, intangibles	(1,069)	(1,260)	$ (1,464)
Balance, goodwill	85,048	85,048	85,018
Balance, intangibles	2,298	3,367
Core deposit intangibles, net	2,298	3,367
Goodwill, gross	85,048	85,048
Goodwill, net	85,048	85,048	$ 85,018	$ 85,048
Core Deposits [Member]
Balance, intangibles	3,367
Balance, intangibles	2,298	3,367
Core deposit intangibles, gross	19,708	19,708
Core deposit intangibles, accumulated amortization	(17,410)	(16,341)
Core deposit intangibles, net	$ 2,298	$ 3,367