Revenue Recognition - Disaggregated Revenues and Product Sales for UNIFI (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 27, 2021	[1]	Mar. 28, 2021	[1]	Dec. 27, 2020	[1]	Sep. 27, 2020	[1]	Jun. 28, 2020	[2]	Mar. 29, 2020	[2]	Dec. 29, 2019	[2]	Sep. 29, 2019	[2]	Jun. 27, 2021	Jun. 28, 2020	Jun. 30, 2019
Disaggregation Of Revenue [Line Items]
Net sales	$ 184,445		$ 178,866		$ 162,776		$ 141,505		$ 86,055		$ 170,994		$ 169,511		$ 179,949		$ 667,592	$ 606,509	$ 708,804
Third-Party Manufacturer [Member]
Disaggregation Of Revenue [Line Items]
Net sales																	656,763	598,510	700,077
Service [Member]
Disaggregation Of Revenue [Line Items]
Net sales																	10,829	7,999	8,727
REPREVE Fiber [Member]
Disaggregation Of Revenue [Line Items]
Net sales																	245,832	186,141	180,254
All Other Products and Services [Member]
Disaggregation Of Revenue [Line Items]
Net sales																	$ 421,760	$ 420,368	$ 528,550

[1] Net sales for the fiscal quarters ended September 27, 2020 and December 27, 2020 includes adverse demand pressures from the COVID-19 pandemic

[2] Net sales for the fiscal quarter ended June 28, 2020, includes the impact of global demand declines and decreased economic activity caused by the COVID-19 pandemic.