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Note 9 - Fair Value Measurements and Fair Values of Financial Instruments - SBA Servicing Assets Sensitivity Analysis (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Jun. 30, 2022
Sep. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Fair Value of SBA Servicing Asset $ 4,181 $ 4,705 $ 4,318 $ 4,572 $ 4,641 $ 4,626
Composition of SBA loans serviced for others 100.00% 100.00%        
Weighted Average Remaining Term (in years) (Year) 19 years 6 months 19 years 7 months 6 days        
Prepayment Speed 14.85% 13.93%        
Effect on fair value of a 10% increase $ (169) $ (204)        
Effect on fair value of a 20% increase $ (326) $ (393)        
Weighted Average Discount Rate 12.25% 10.00%        
Effect on fair value of a 10% increase $ (152) $ (148)        
Effect on fair value of a 20% increase $ (293) $ (288)        
Fixed Rate SBA Loans [Member]            
Composition of SBA loans serviced for others 3.00% 4.00%        
Adjustable Rate SBA Loans [Member]            
Composition of SBA loans serviced for others 97.00% 96.00%