v3.26.1
Cover - shares
3 Months Ended
Mar. 31, 2026
Jun. 12, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-40760  
Registrant Name ATLANTIC INTERNATIONAL CORP  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 46-5319744  
Entity Address, Address Line One 270 Sylvan Avenue  
Entity Address, Address Line Two Suite 2230  
Entity Address, City or Town Englewood Cliffs  
Entity Address, State or Province NJ  
Entity Address, Postal Zip Code 07632  
City Area Code (201)  
Local Phone Number 899-4470  
Title of 12(b) Security None  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   81,293,032
Entity Central Index Key 0001605888  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
No Trading Symbol Flag true