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Document and Entity Information - shares | 6 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Aug. 07, 2023
Cover [Abstract] |  |
Document Type | 10-Q/A |
Amendment Flag | true |
Document Period End Date | Jun. 30, 2023 |
Document Fiscal Year Focus | 2023 |
Document Fiscal Period Focus | Q2 |
Entity Registrant Name | ADTRAN Holdings, Inc. |
Trading Symbol | ADTN |
Entity Central Index Key | 0000926282 |
Current Fiscal Year End Date | --12-31 |
Entity Filer Category | Large Accelerated Filer |
Entity Small Business | false |
Entity Emerging Growth Company | false |
Entity Common Stock, Shares Outstanding |  | 78,681,829
Entity Current Reporting Status | Yes |
Entity Interactive Data Current | Yes |
Entity Shell Company | false |
Entity File Number | 001-41446 |
Entity Tax Identification Number | 87-2164282 |
Entity Address, Address Line One | 901 Explorer Boulevard |
Entity Address, City or Town | Huntsville |
Entity Address, State or Province | AL |
Entity Address, Postal Zip Code | 35806-2807 |
City Area Code | 256 |
Local Phone Number | 963-8000 |
Entity Incorporation, State or Country Code | DE |
Document Quarterly Report | true |
Document Transition Report | false |
Title of 12(b) Security | Common Stock, Par Value $0.01 per share |
Security Exchange Name | NASDAQ |
Amendment Description | ADTRAN Holdings, Inc. (“ADTRAN,” the “Company,” “we,” “us” or “our”) is filing this Amendment No. 1 on Form 10-Q/A (this “Amendment No. 1”) to amend and restate certain portions of the Company’s Quarterly Report on Form 10-Q for the period ended June 30, 2023 filed with the U.S. Securities and Exchange Commission (the “SEC”) on August 14, 2023 (the “Original Filing”).As previously disclosed in the Company’s Current Report on Form 8-K filed with the SEC on February 20, 2024, the Audit Committee of the Board of Directors of the Company (the “Audit Committee”) concluded, after considering the recommendations of management that the results attributable to the non-controlling interest and the net loss attributable to the Company and, as a consequence, the loss per common share attributable to the Company, were materially misstated in (i) the Company’s unaudited condensed consolidated financial statements as of and for the quarter months ended March 31, 2023 included in the Company’s Quarterly Report on Form 10-Q/A for the fiscal quarter ended March 31, 2023, (ii) the Company’s unaudited condensed consolidated financial statements as of and for the quarter and six months ended June 30, 2023 included in the Original Filing and (iii) the Company’s unaudited condensed consolidated financial statements as of and for the quarter and nine months ended September 30, 2023 included in the Company’s Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2023, respectively (collectively, the “Non-Reliance Periods”), and that such financial statements should no longer be relied upon.The misstatements occurred following the effectiveness of the Domination Profit and Loss Transfer Agreement (“DPLTA”) between the Company and the Company’s majority-owned subsidiary, Adtran Networks SE (formerly ADVA Optical Networking SE and referred to herein as “Adtran Networks”) upon the registration of the DPLTA with the commercial register on January 16, 2023. Pursuant to the DPLTA, the minority shareholders of Adtran Networks are guaranteed recurring cash compensation commencing with respect to the 2023 fiscal year. The Company incorrectly presented the guaranteed cash compensation attributable to the non-controlling interest as a loss rather than income attributable to the non-controlling interest during the Non-Reliance Periods. This error resulted in an understatement of net income attributable to the non-controlling interest, an understatement of net loss attributable to the Company and loss per common share attributable to ADTRAN Holdings, Inc. - basic and diluted. Additionally, the Company identified an error in the allocation of comprehensive income (loss) attributable to non-controlling interest. This error resulted in an understatement of comprehensive income attributable to non-controlling interest and an understatement of comprehensive loss attributable to the Company. This error also resulted in an understatement of additional paid-in capital and overstatement of accumulated other comprehensive income. In connection with the Q2 2023 restatement and the filing of this Amendment No. 1, the Company has also revised its condensed consolidated balance sheet and condensed consolidated statement of changes in equity as of December 31, 2022 to correct for an error that the Company determined was not material to the Company’s Q3, Q4 and full year 2022 consolidated financial statements as further described in Note 1 “Basis of Presentation”. Refer to Note 1, “Basis of Presentation”, of Notes to Condensed Consolidated Financial Statements of this Form 10-Q/A for additional information and for the summary of the accounting impacts of the restatement and revision adjustments to the Company’s condensed consolidated financial statements.As a result of the above described error and the identification of the material weaknesses (as described in Item 4 of this Amendment No. 1), the Company is filing this Amendment No. 1 to (i) restate the disclosure on the effectiveness of the Company’s disclosure controls in Part I, Item 4 of the Original Filing to reflect the material weaknesses in the Company’s internal control over financial reporting that existed as of June 30, 2023, (ii) restate the Company’s Condensed Consolidated Balance Sheets and the Condensed Consolidated Statement of Changes in Equity to reflect adjustments to additional paid-in capital and accumulated other comprehensive income (iii) restate the Company’s Condensed Consolidated Statements of Loss to reflect adjustments to net loss attributable to non-controlling interest, net loss attributable to the Company, and loss per common share attributable to the Company – basic and diluted, (iv) restate the Company’s Condensed Consolidated Statements of Comprehensive Loss to reflect adjustments to comprehensive income attributable to non-controlling interest and comprehensive loss attributable to the Company (v) restate two risk factors related to the Company’s material weaknesses and restatements, (vi) restate the disclosure in Part I, Item 2, MD&A of the Original Filing to reflect the adjustments discussed above, and (vii) amend Part II – Item 6 (Exhibits) of the Original Filing to include currently dated certifications from the Company’s Chief Executive Officer and Chief Financial Officer as required by Section 302 and 906 of the Sarbanes-Oxley Act of 2002.Pursuant to Rule 12b-15 promulgated by the SEC under the Securities Exchange Act of 1934, as amended, the Company has included the entire text of Part I, Items 1, 2 and 4, as well as Part II, Items 1A and 6, of the Original Filing in this Amendment No. 1. There have been no changes to the text of Part I, Items 1, 2 and 4, or Part II, Items 1A and 6, other than the changes stated in the immediately preceding paragraph. Other than as described above and through the inclusion with this Amendment No. 1 of new certifications by management, this Amendment No. 1 speaks only as of the date of the Original Filing and does not amend, supplement, or update any information contained in the Original Filing, to give effect to any subsequent events (including with respect to the cover page of the Original Filing, which has been updated only to present this filing as Amendment No. 1). Accordingly, this Amendment No. 1 should be read in conjunction with the Original Filing, and our reports (including any amendments thereto) filed with the SEC subsequent to the Original Filing. |

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