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Note 1 - Basis of Presentation | 9 Months Ended
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Sep. 30, 2025
Notes to Financial Statements |
Basis of Accounting [Text Block] | NOTE 1 Basis of Presentation The accompanying unaudited consolidated interim financial statements and notes thereto of the Company have been prepared in accordance with instructions for Form 10-Q and, therefore, do not include all disclosures required by accounting principles generally accepted in the United States of America (“GAAP”) for complete presentation of financial statements. In the opinion of management, the consolidated financial statements contain all adjustments (consisting only of normal recurring accruals) necessary to present fairly the consolidated balance sheets of Alerus Financial Corporation (“the Company”) as of September 30, 2025 and December 31, 2024, the consolidated statements of income for the three and nine months ended September 30, 2025 and 2024, the consolidated statements of comprehensive income (loss) for the three and nine months ended September 30, 2025 and 2024, the consolidated statements of changes in stockholders’ equity for the three and nine months ended September 30, 2025 and 2024, and the consolidated statements of cash flows for the nine months ended September 30, 2025 and 2024. The accompanying unaudited consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. The Company’s principal operating subsidiary is Alerus Financial, National Association (the “Bank”). Certain items previously reported have been reclassified to conform to the current period’s reporting format. Such reclassifications did not affect net income or stockholders’ equity. The results of operations for the interim periods are not necessarily indicative of the results for the full year or any other period. The Company has also evaluated all subsequent events for potential recognition and disclosure through the date of the filing of this Quarterly Report on Form 10-Q. These interim unaudited financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto as of and for the year ended December 31, 2024, included in the Company’s Annual Report on Form 10-K filed with the SEC on March 14, 2025.

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- Definition The entire disclosure for the basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483426/235-10-50-4 + Details
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