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Note 5 - Fair Value Measurements - Additional Quantitative Information About Assets Measured at Fair Value on Non-recurring Basis (Details) - Fair Value, Nonrecurring [Member]
$ in Thousands
Mar. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Other real estate owned   $ 5,792
Fair Value, Inputs, Level 3 [Member]    
Other real estate owned   5,792
Fair Value, Inputs, Level 3 [Member] | Appraisal of Collateral [Member]    
Individually analyzed loans held for investment $ 16,842 [1] 1,143 [2]
Other real estate owned [2]   $ 5,792
Fair Value, Inputs, Level 3 [Member] | Appraisal of Collateral [Member] | Minimum [Member]    
Individually analyzed loans held for investment [1] 0.204  
Fair Value, Inputs, Level 3 [Member] | Appraisal of Collateral [Member] | Minimum [Member] | Measurement Input, Appraised Value [Member]    
Individually analyzed loans held for investment [3]   0.120
Other real estate owned [3]   0.084
Fair Value, Inputs, Level 3 [Member] | Appraisal of Collateral [Member] | Maximum [Member]    
Individually analyzed loans held for investment 0.311  
Fair Value, Inputs, Level 3 [Member] | Appraisal of Collateral [Member] | Weighted Average [Member]    
Individually analyzed loans held for investment (0.204)  
[1] Fair value is generally determined through independent appraisals of the underlying collateral, which typically include various level III inputs that are not identifiable, less any associated allowance.
[2] 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.
[3] 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.