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Note 22 - Selected Quarterly Financial Data (Unaudited) - Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Total income | $ 13,436 | $ 13,885 | $ 13,720 | $ 13,484 | $ 13,459 | $ 12,829 | $ 12,129 | $ 11,940 | $ 54,525 | $ 50,357
Interest expense | 3,128 | 3,307 | 3,451 | 3,254 | 2,998 | 2,584 | 2,287 | 2,040 | 13,140 | 9,909
Net interest income | 10,308 | 10,578 | 10,269 | 10,230 | 10,461 | 10,245 | 9,842 | 9,900 | 41,385 | 40,448
Provision for loan losses | 460 | 80 | 110 | 240 | 210 | 210 | 210 | 210 |  |
Net interest income after provision for loan losses | 9,848 | 10,498 | 10,159 | 9,990 | 10,251 | 10,035 | 9,632 | 9,690 | 40,495 | 39,608
Total noninterest income | 1,305 | 1,105 | 1,299 | 1,132 | 977 | 954 | 1,009 | 788 | 4,841 | 3,728
Total noninterest expense | 7,378 | 7,673 | 7,482 | 7,500 | 7,243 | 7,092 | 7,063 | 7,345 | 30,033 | 28,743
Income before income tax benefit | 3,775 | 3,930 | 3,976 | 3,622 | 3,985 | 3,897 | 3,578 | 3,133 | 15,303 | 14,593
Income tax benefit | 634 | 661 | 686 | 611 | 560 | 593 | 481 | 528 | 2,592 | 2,162
Net income | $ 3,141 | $ 3,269 | $ 3,290 | $ 3,011 | $ 3,425 | $ 3,304 | $ 3,097 | $ 2,605 | $ 12,711 | $ 12,431
Net income, basic (in dollars per share) | $ 0.48 | $ 0.51 | $ 0.51 | $ 0.46 | $ 0.53 | $ 0.51 | $ 0.48 | $ 0.41 | $ 1.96 | $ 1.92
Net income, diluted (in dollars per share) | $ 0.49 | $ 0.50 | $ 0.50 | $ 0.46 | $ 0.53 | $ 0.51 | $ 0.48 | $ 0.40 | $ 1.95 | $ 1.91
Weighted-average common shares and common stock equivalents used to calculate basic earnings per share (in shares) | 6,423,543 | 6,458,258 | 6,502,508 | 6,498,278 | 6,478,360 | 6,468,786 | 6,451,452 | 6,440,524 | 6,470,408 | 6,459,908
Weighted-average common shares and common stock equivalents used to calculate diluted earnings per share (in shares) | 6,455,387 | 6,479,066 | 6,514,946 | 6,510,568 | 6,500,298 | 6,496,652 | 6,480,658 | 6,476,138 | 6,502,806 | 6,487,814

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