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Note 8 - Intangible Assets - Estimated Remaining Amortization Expense on Intangible Assets on Core Deposits (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Total $ 2,654   $ 3,133      
Core Deposits [Member]            
2021 148          
2022 575          
2023 502          
2024 337          
2025 300          
2026 268          
After 524          
Total $ 2,654 $ 2,813 $ 3,133 $ 3,309 $ 3,525 $ 3,959