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Note 7 - Intangible Assets - Estimated Remaining Amortization Expense on Intangibles (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Remainder of 2020 $ 358,000  
2021 477,000  
2022 477,000  
2023 477,000  
2024 477,000  
Thereafter 119,000  
Core deposit intangible, net $ 2,384,660 $ 2,503,910