Note 11 - Fair Value Measurements - Fair Value of Assets Measured on Recurring Basis, Unobservable Input Reconciliation (Details) $ in Thousands	Jun. 30, 2026 USD ($)	Dec. 31, 2025 USD ($)
Valuation, Market Approach [Member]
Real estate owned	$ 318	$ 424
Valuation, Market Approach [Member] \| Measurement Input, Discount Rate [Member] \| Minimum [Member]
Real estate owned measurement input	0.308	0.141
Valuation, Market Approach [Member] \| Measurement Input, Discount Rate [Member] \| Maximum [Member]
Real estate owned measurement input	0.308	0.571
Valuation, Market Approach [Member] \| Measurement Input, Discount Rate [Member] \| Weighted Average [Member]
Real estate owned measurement input	0.308	0.323
Mortgage Derivative [Member] \| Valuation Technique, Pricing Model [Member]
Mortgage banking derivatives, fair value	$ 760	$ 399
Mortgage Derivative [Member] \| Valuation Technique, Pricing Model [Member] \| Pull Through Rate [Member] \| Minimum [Member]
Mortgage banking derivatives, measurement input	0.71	0.691
Mortgage Derivative [Member] \| Valuation Technique, Pricing Model [Member] \| Pull Through Rate [Member] \| Maximum [Member]
Mortgage banking derivatives, measurement input	1	0.996
Mortgage Derivative [Member] \| Valuation Technique, Pricing Model [Member] \| Pull Through Rate [Member] \| Weighted Average [Member]
Mortgage banking derivatives, measurement input	0.896	0.876