Document And Entity Information - shares	3 Months Ended
	Sep. 30, 2018	Nov. 01, 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	--06-30
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding (in shares)		18,382,797
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false