Note 8 - Fair Value - Nonrecurring Measurements Valuation Techniques (Details) $ in Thousands	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
Commercial Real Estate Portfolio Segment [Member] \| Valuation, Income Approach [Member]
Loans, fair value	$ 14,718	$ 9,184
Commercial Real Estate Portfolio Segment [Member] \| Valuation, Income Approach [Member] \| Minimum [Member] \| Measurement Input, Cap Rate [Member]
Loans, measurement input	0.6333	(0.5794)
Commercial Real Estate Portfolio Segment [Member] \| Valuation, Income Approach [Member] \| Maximum [Member] \| Measurement Input, Cap Rate [Member]
Loans, measurement input	0.4649	0.4177
Commercial Real Estate Portfolio Segment [Member] \| Valuation, Income Approach [Member] \| Weighted Average [Member] \| Measurement Input, Cap Rate [Member]
Loans, measurement input	0.0856	0.1531
Commercial Portfolio Segment [Member] \| Valuation, Market Approach [Member]
Loans, fair value	$ 8,168
Commercial Portfolio Segment [Member] \| Valuation, Market Approach [Member] \| Measurement Input, Price Volatility [Member]
Loans, measurement input	0.0758
Commercial Portfolio Segment [Member] \| Valuation Technique, Consensus Pricing Model [Member]
Loans, fair value		$ 2,137
Commercial Portfolio Segment [Member] \| Valuation Technique, Consensus Pricing Model [Member] \| Measurement Input, Cap Rate [Member]
Loans, measurement input		0.0914
Residential Portfolio Segment [Member] \| Valuation, Market Approach [Member]
Loans, fair value	$ 305	$ 597
Residential Portfolio Segment [Member] \| Valuation, Market Approach [Member] \| Minimum [Member] \| Measurement Input, Cap Rate [Member]
Loans, measurement input	(0.204)	(0.1158)
Residential Portfolio Segment [Member] \| Valuation, Market Approach [Member] \| Maximum [Member] \| Measurement Input, Cap Rate [Member]
Loans, measurement input	0.1444	0.1418
Residential Portfolio Segment [Member] \| Valuation, Market Approach [Member] \| Weighted Average [Member] \| Measurement Input, Cap Rate [Member]
Loans, measurement input	(0.0492)	(0.0626)