v3.25.4
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Feb. 28, 2026
Jun. 30, 2025
Cover [Abstract]        
Entity Registrant Name ACME UNITED CORP      
Entity Central Index Key 0000002098      
Document Type 10-K      
Document Period End Date Dec. 31, 2025      
Amendment Flag false      
Current Fiscal Year End Date --12-31      
Entity Current Reporting Status Yes      
Entity Filer Category Accelerated Filer      
Entity Common Stock, Shares Outstanding     3,808,225  
Document Fiscal Period Focus FY      
Document Fiscal Year Focus 2025      
Entity Public Float       $ 138,208,393
Trading Symbol ACU      
Entity Emerging Growth Company false      
Document Financial Statement Error Correction [Flag] false      
Entity Small Business true      
Entity Shell Company false      
Entity File Number 01-07698      
Entity Tax Identification Number 06-0236700      
Entity Address, Address Line One 1 Waterview Drive      
Entity Address, City or Town Shelton      
Entity Address, State or Province CT      
Entity Address, Postal Zip Code 06484      
City Area Code 203      
Local Phone Number 254-6060      
Entity Interactive Data Current Yes      
Title of 12(b) Security $2.50 par value Common Stock      
Security Exchange Name NYSEAMER      
Entity Incorporation, State or Country Code CT      
Document Annual Report true      
Document Transition Report false      
Entity Voluntary Filers No      
Entity Well-known Seasoned Issuer No      
ICFR Auditor Attestation Flag true      
Auditor Name CBIZ CPAs P.C. Marcum LLP    
Auditor Location Hartford, Connecticut Boston, Massachusetts    
Auditor Firm Id 199 688    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

 

(1) Certain portions of the Company’s Proxy Statement for the Annual Meeting scheduled for April 27, 2026 are incorporated into the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, in Part III.

      
Auditor Opinion [Text Block]

Opinion on the Financial Statements

 

We have audited the accompanying consolidated balance sheet of Acme United Corporation and Subsidiaries (the “Company”) as of December 31, 2025, the related consolidated statements of operations, comprehensive income, changes in stockholders’ equity and cash flows for the year ended December 31, 2025, and the related notes (collectively referred to as the “financial statements”).

 

In our opinion, based on our audit, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2025, and the results of its operations and its cash flows for the year ended December 31, 2025, in conformity with accounting principles generally accepted in the United States of America.

 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) ("PCAOB"), the Company's internal control over financial reporting as of December 31, 2025, based on the criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in 2013 and our report dated March 11, 2026, expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

Opinion on Internal Control over Financial Reporting

 

We have audited Acme United Corporation and Subsidiaries’ (the “Company”) internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in 2013. In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2025, based on criteria established in COSO.

 

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the consolidated balance sheet as of December 31, 2025 and the related consolidated statements of operations, comprehensive income, changes in shareholders’ equity, and cash flows and the related notes (collectively referred to as the “financial statements”) for the year ended December 31, 2025 of the Company, and our report dated March 11, 2026 expressed an unqualified opinion on those financial statements.

Opinion on the Financial Statements

 

We have audited the accompanying consolidated balance sheet of Acme United Corporation and Subsidiaries (the “Company”) as of December 31, 2024, the related consolidated statements of operations, comprehensive income, changes in stockholders’ equity and cash flows for the year ended December 31, 2024, and the related notes (collectively referred to as the “financial statements”). In our opinion, based on our audit, the 2024 financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024, and the results of its operations and its cash flows for the year ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.

 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) ("PCAOB"), the Company's internal control over financial reporting as of December 31, 2024, based on the criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in 2013 and our report dated March 6, 2025, expressed an adverse opinion on the effectiveness of the Company’s internal control over financial reporting because of the existence of a material weakness.