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Note 16 - Fair Value Measurements - Assets Measured At Fair Value on a Non-recurring Basis and Quantitative Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Recorded investment $ 7,600 $ 9,973
Related allowance 34 26
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Valuation, Market Approach [Member]    
Other real estate owned, recorded investment   920
Other real estate owned, allowance   0
Other real estate owned, fair value   920
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Valuation, Market Approach [Member] | Impaired Loans, Collateral Dependent [Member]    
Recorded investment 1,902 3,208
Related allowance 8 0
Fair Value $ 1,894 $ 3,208
Selling Cost 10.00% 10.00%
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Valuation, Market Approach [Member] | Other Real Estate Owned [Member]    
Selling Cost   1.00%
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Valuation, Income Approach [Member] | Impaired Loans, Other [Member]    
Recorded investment $ 5,698 $ 6,765
Related allowance 26 26
Fair Value $ 5,672 $ 6,739
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Valuation, Income Approach [Member] | Impaired Loans, Other [Member] | Minimum [Member]    
Discount Rate 3.00% 3.00%
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] | Valuation, Income Approach [Member] | Impaired Loans, Other [Member] | Maximum [Member]    
Discount Rate 10.25% 8.75%