Note 15 - Regulatory Matters and Impact on Payment of Dividends - Summary of Regulatory Capital (Details) $ in Thousands	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Shareholders' equity	$ 253,036	$ 235,303	$ 200,675	$ 238,604
Common Equity Tier 1 Capital to risk-weighted assets	0.045
Tier 1 capital to risk-weighted assets	0.06
Total capital (tier 1 capital plus tier 2 capital) to risk-weighted assets	0.08
Leverage ratio (tier 1 capital to adjusted quarterly average total assets)	0.04
Subsidiaries [Member]
Shareholders' equity	$ 259,811	242,528
Goodwill and other intangible assets	(100,279)	(84,897)
Accumulated other comprehensive loss	19,189	22,336
Tier 1 risk-based capital	178,721	179,967
Eligible allowance for credit losses	11,805	10,318
Total risk-based capital	$ 190,526	$ 190,285
Common Equity Tier 1 Capital to risk-weighted assets	0.0994	0.1017
Tier 1 capital to risk-weighted assets	0.0994	0.1017
Total capital (tier 1 capital plus tier 2 capital) to risk-weighted assets	0.106	0.1075
Leverage ratio (tier 1 capital to adjusted quarterly average total assets)	0.0794	0.0805