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Note 6 - Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Balance |  | $ 146,044 | $ 140,695 | $ 143,810 | $ 137,775
Other comprehensive income (loss) | [1] |  |  |  | 2,235
Balance |  | 146,055 | 142,056 | 146,055 | 142,056
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] |  |  |  |  |
Balance | [1] | 3,893 | 3,761 | 4,284 | 1,842
Other comprehensive income (loss) | [1] | (283) | 316 | (674) |
Balance | [1] | $ 3,610 | $ 4,077 | $ 3,610 | $ 4,077
[1] | All amounts are net of tax. Amounts in parentheses indicate debits to AOCI.

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