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Note 10 - Intangible Assets - Estimated Future Amortization Expense (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
2021 $ 180  
2022 676  
2023 624  
2024 585  
2025 511  
Thereafter 673  
Total 3,249  
Mortgage Servicing Rights [Member]    
2021 173  
2022 666  
2023 624  
2024 585  
2025 511  
Thereafter 673  
Total 3,232 $ 3,043
Core Deposits [Member]    
2021 7  
2022 10  
2023 0  
2024 0  
2025 0  
Thereafter 0  
Total $ 17 $ 57