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Note 17 - 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, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019
Interest income | $ 12,543 | $ 12,485 | $ 13,194 | $ 14,653 | $ 15,732 | $ 16,628 | $ 16,522 | $ 16,526 | $ 52,875 | $ 65,408
Interest expense | 947 | 1,488 | 1,869 | 2,684 | 3,105 | 3,386 | 3,419 | 3,307 | 6,988 | 13,217
Net interest income | 11,596 | 10,997 | 11,325 | 11,969 | 12,627 | 13,242 | 13,103 | 13,219 | 45,887 | 52,191
Interest Income (Expense), Net, Total | 11,596 | 10,997 | 11,325 | 11,969 | 12,627 | 13,242 | 13,103 | 13,219 | 45,887 | 52,191
Provision for loan losses | (271) | (187) | 42 | 471 | 89 | (134) | 3,957 | (87) | 55 | 3,825
Net interest income after provision for (recovery of) loan losses | 11,867 | 11,184 | 11,283 | 11,498 | 12,538 | 13,376 | 9,146 | 13,306 | 45,832 | 48,366
Total noninterest income | 1,541 | 1,264 | 1,163 | 1,398 | 1,648 | 1,474 | 1,426 | 1,624 | 5,366 | 6,172
Other expense | 9,774 | 9,787 | 9,249 | 9,628 | 9,562 | 9,509 | 9,472 | 10,098 | 38,438 | 38,641
Income before income tax and undistributed subsidiary excess distributions | 3,634 | 2,661 | 3,197 | 3,268 | 4,624 | 5,341 | 1,100 | 4,832 | 12,760 | 15,897
Income tax expense | 1,189 | 713 | 845 | 850 | 1,234 | 1,417 | 293 | 1,281 | 3,597 | 4,225
Net income | $ 2,445 | $ 1,948 | $ 2,352 | $ 2,418 | $ 3,390 | $ 3,924 | $ 807 | $ 3,551 | $ 9,163 | $ 11,672
Basic and diluted earnings per common share (in dollars per share) | $ 0.17 | $ 0.13 | $ 0.16 | $ 0.16 | $ 0.22 | $ 0.26 | $ 0.05 | $ 0.22 | $ 0.61 | $ 0.75
Net interest income | $ 11,867 | $ 11,184 | $ 11,283 | $ 11,498 | $ 12,538 | $ 13,376 | $ 9,146 | $ 13,306 | $ 45,832 | $ 48,366
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total | $ 2,445 | $ 1,948 | $ 2,352 | $ 2,418 | $ 3,390 | $ 3,924 | $ 807 | $ 3,551 | $ 9,163 | $ 11,672

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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121326447&loc=d3e1337-109256 + Details
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