Note 16 - 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]		Dec. 31, 2022	Dec. 31, 2021
Minimum [Member]
Collateral dependent assets with specific reserves	[1],[2]	0.03	0
OREO	[1],[2]	0.20	0
Maximum [Member]
Collateral dependent assets with specific reserves	[1],[2]	0.03	0.11
OREO	[1],[2]	1	0.87
Weighted Average [Member]
Collateral dependent assets with specific reserves	[1],[2]	0.03	0.06
OREO	[1],[2]	0.69	0.32

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

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