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Note 13 - Loan Commitments and Other Off-balance-sheet Activities (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] |
|  | December 31, |
|  | 2020 |  |  | 2019 |
Financial instruments wherein contractual amounts represent credit risk |  |  |  |  |  |  |  |
Commitments to extend credit |  | $ | 31,131 |  |  | $ | 19,737 |
Standby letters of credit |  |  | 6,668 |  |  |  | 6,119 |
Unused lines of credit |  |  | 200,240 |  |  |  | 149,771 |

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