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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2022
Mar. 10, 2023
Jun. 30, 2022
Cover [Abstract]      
Entity Registrant Name ACME UNITED CORP    
Entity Central Index Key 0000002098    
Document Type 10-K    
Document Period End Date Dec. 31, 2022    
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   3,538,179  
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2022    
Entity Public Float     $ 138,013,594
Trading Symbol ACU    
Entity Emerging Growth Company 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 Marcum LLP    
Auditor Location Boston, Massachusetts    
Auditor Firm Id 688    
Documents Incorporated by Reference

DOCUMENTS INCORPORATE BY REFERENCE

 

(1)        Certain portions of the Company’s Proxy Statement for the Annual Meeting scheduled for April 24, 2023 are incorporated into the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, in Part III.