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Note 8 - Borrowed Funds (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Summary of Comparative Data of Securities Sold under Agreements to Repurchase [Table Text Block] |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | (Dollars in thousands) |
Average amount outstanding during the year (1) |  | $ | — |  |  | $ | — |  |  | $ | 49,589 |
Maximum amount outstanding at month-end (2) |  |  | — |  |  |  | — |  |  |  | 100,000 |
Balance, December 31 |  |  | — |  |  |  | — |  |  |  | — |
Rate, December 31 |  |  | — | % |  |  | — | % |  |  | — | %
Weighted average interest rate for the year |  |  | — | % |  |  | — | % |  |  | — | %

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