Note 5 - Fair Value Measurements - Additional Quantitative Information About Assets Measured at Fair Value on Non-recurring Basis (Details) - Fair Value, Nonrecurring [Member] - Fair Value, Inputs, Level 3 [Member] - Appraisal of Collateral [Member] $ in Thousands		Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Collateral-dependent loans		$ 3,087	$ 3,321
Measurement Input, Appraised Value [Member] | Minimum [Member]
Collateral-dependent loans, range	[1]	0
Measurement Input, Appraised Value [Member] | Maximum [Member]
Collateral-dependent loans, range	[2]	0.239
Measurement Input, Appraised Value [Member] | Weighted Average [Member]
Collateral-dependent loans, range		0.239	0.239

[1] Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level III inputs that are not identifiable, less any associated allowance.

[2] Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.