Note 7 - Goodwill and Intangibles - Core Deposit Intangibles by Reportable Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Core deposit intangible	$ 13,821	$ 16,759	$ 9,349
Core Deposits [Member]
Segment Reporting Information [Line Items]
Core deposit intangible	13,821	16,759	9,349	$ 11,381
CRBT | Core Deposits [Member]
Segment Reporting Information [Line Items]
Core deposit intangible	883	1,225	1,702
CSB | Core Deposits [Member]
Segment Reporting Information [Line Items]
Core deposit intangible	1,430	2,027	2,653
GB | Core Deposits [Member]
Segment Reporting Information [Line Items]
Core deposit intangible	$ 11,508	$ 13,507	$ 4,994