Document And Entity Information - shares
9 Months Ended
Mar. 25, 2018
Apr. 26, 2018
Document Document And Entity Information [Abstract]    
Entity Registrant Name UNIFI INC  
Entity Central Index Key 0000100726  
Trading Symbol ufi  
Current Fiscal Year End Date --06-24  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding (in shares)   18,335,727
Document Type 10-Q  
Document Period End Date Mar. 25, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Amendment Flag false