Note 13 - Fair Value - Quantitative Information for Assets Measured at Fair Value on Nonrecurring Basis (Details) - Fair Value, Nonrecurring [Member] - Measurement Input, Discount Rate [Member] - Valuation, Market Approach [Member]		Mar. 31, 2024	Dec. 31, 2023
Minimum [Member]
Collateral dependent assets with specific reserves	[1]	0
Weighted Average [Member]
Collateral dependent assets with specific reserves	[1],[2]	0.38	0.42
OREO	[1],[2]	0.50	0.60

[1] Fair value is generally based on appraisals of the underlying collateral.

[2] Appraisals may be adjusted by management for customized discounting criteria, estimated sales costs, and proprietary qualitative adjustments.