Organization and Nature of Operations	6 Months Ended
Organization and Nature of Operations	Jun. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Nature of Operations	Note 1: Organization and Nature of Operations On June 18, 2024 (the “Closing Date”), Atlantic International Corp. (“Atlantic” or the “Company,” formerly known as SeqLL Inc.) completed the acquisition (the “Merger”) of Lyneer Investments LLC and its operating subsidiaries, including Lyneer Staffing Solutions, LLC (collectively, “Lyneer”). See Note 2: Merger and Acquistion for further information. The Company was incorporated in Delaware under the name SeqLL Inc. on April 1, 2014. The Company historically operated as a commercial-stage life science instrumentation and research services company engaged in development of scientific assets and novel intellectual property across multiple “Omics” fields. Pursuant to the terms and Conditions of the Amended and Restated Agreement and Plan of Reorganization dated as of June 4, 2024, as amended (the “Merger Agreement”), all of our current business operations have been sold to SeqLL Omics, a newly formed company owned by our former employees and management, our operating business is now that of Lyneer. Our corporate headquarters have been relocated to 270 Sylvan Avenue, Suite 2230, Englewood Cliffs, New Jersey 07632. Lyneer Investments, LLC (“Lyneer Investments”) is a limited liability company formed in the State of Delaware on January 9, 2018. Lyneer Investments is owned by its members and is now a wholly-owned subsidiary of the Company. The members of Lyneer Investments have limited personal liability for the obligations and debts of Lyneer Investments under Delaware law. Lyneer Holdings, Inc. (“Lyneer Holdings”), a wholly-owned subsidiary of Lyneer Investments, and Lyneer Staffing Solutions, LLC (“LSS”), a wholly-owned subsidiary of Lyneer Holdings, were also incorporated and formed, respectively, in the State of Delaware on January 9, 2018. Lyneer Investments, Lyneer Holdings, and LSS are collectively referred to herein as “Lyneer.” The Company specializes in the placement of temporary and temporary-to-permanent labor across various industries throughout the United States of America (“USA”). The Company primarily places individuals in accounting and finance, administrative and clerical, information technology, legal, light industrial, and medical roles. The Company is also a leading provider of productivity consulting and workforce management solutions. The Company has more than 100 locations throughout the USA. On August 31, 2021 (the “Acquisition Date” or the “Transaction Date”), IDC Technologies, Inc., a California corporation (“Parent” “IDC” or the “Acquirer”) obtained a controlling financial interest in Lyneer Investments by acquiring ninety (90%) percent of Lyneer Investments’ outstanding equity (the “Transaction”) pursuant to a membership interest purchase agreement (the “Transaction Agreement”) executed with the selling parties (“Sellers”). Following the closing of the Transaction, one of the Sellers, Lyneer Management Holdings, LLC (“LMH”) an entity owned primarily by certain members of the executive management team of the Company continued to own 10% equity interest in Lyneer. The Transaction represented a change of control with respect to Lyneer Investments and was accounted for as a business combination in accordance with the guidance prescribed in Accounting Standard Codification (“ASC”) Topic 805 - Business Combinations (“ASC 805”). Lyneer Investments applied pushdown accounting as of the Acquisition Date. On February 28, 2024, LMH exercised its right to put the LMH Units to IDC and IDC owned 100% of all the membership interests in Lyneer Investments. On October 29, 2024, the Company formed a subsidiary in Delaware. This inactive subsidiary is named A36 Merger Sub, Inc. and all 100 shares of its common stock are owned by the Company.