Revenue Recognition - Disaggregated Revenues for UNIFI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 27, 2020	Dec. 29, 2019	Dec. 27, 2020	Dec. 29, 2019
Disaggregation Of Revenue [Line Items]
Net sales	$ 162,776	$ 169,511	$ 304,281	$ 349,460
Third-Party Manufacturer [Member]
Disaggregation Of Revenue [Line Items]
Net sales	160,146	167,537	298,987	345,557
Service [Member]
Disaggregation Of Revenue [Line Items]
Net sales	2,630	1,974	5,294	3,903
REPREVE Fiber [Member]
Disaggregation Of Revenue [Line Items]
Net sales	60,660	56,893	110,518	113,378
Non-REPREVE Fiber [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 102,116	$ 112,618	$ 193,763	$ 236,082