Quarterly Results (Unaudited) - Schedule of Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 29, 2025		Mar. 30, 2025		Dec. 29, 2024		Sep. 29, 2024		Jun. 30, 2024		Mar. 31, 2024		Dec. 31, 2023		Oct. 01, 2023		Jun. 29, 2025	Jun. 30, 2024	Jul. 02, 2023
Quarterly Financial Data [Abstract]
Net sales	$ 138,535	[1]	$ 146,557	[1]	$ 138,880	[1]	$ 147,372	[1]	$ 157,452	[2]	$ 148,996	[2]	$ 136,917	[2]	$ 138,844	[2]	$ 571,344	$ 582,209	$ 623,527
Gross (loss) profit	(1,129)	[3]	(445)	[3]	534	[3]	9,458	[3]	10,791	[4]	4,764	[4]	1,636	[4]	(575)	[4]	8,418	16,616	14,241
Net loss	$ 15,470	[5]	$ (16,794)	[5]	$ (11,392)	[5]	$ (7,632)	[5]	$ (3,984)	[6]	$ (10,295)	[6]	$ (19,846)	[6]	$ (13,270)	[6]	$ (20,348)	$ (47,395)	$ (46,344)
Net (loss) income per common share, Basic	$ 0.84	[7]	$ (0.92)	[7]	$ (0.62)	[7]	$ (0.42)	[7]	$ (0.22)	[7]	$ (0.57)	[7]	$ (1.1)	[7]	$ (0.73)	[7]	$ (1.11)	$ (2.61)	$ (2.57)
Net (loss) income per common share, Diluted	$ 0.82	[7]	$ (0.92)	[7]	$ (0.62)	[7]	$ (0.42)	[7]	$ (0.22)	[7]	$ (0.57)	[7]	$ (1.1)	[7]	$ (0.73)	[7]	$ (1.11)	$ (2.61)	$ (2.57)

[1] Net sales for fiscal 2025 includes lower volumes in the Americas and Asia Segments.

[2] Net sales for fiscal 2024 includes lower volumes in the Americas and Asia Segments as a result of lower global demand in connection with inventory destocking efforts of major brands and retailers.

[3] Gross profit (loss) for our domestic operations for all fiscal quarters of fiscal 2025 was impacted by softer sales and profitability in the Asia Segment and transition costs in the Americas Segment.

[4] Gross (loss) profit for our domestic operations for all fiscal quarters of fiscal 2024 was impacted by higher manufacturing costs and lower conversion margins.

[5] Net (loss) income for our domestic operations for all fiscal quarters of fiscal 2025 includes the adverse pressures on gross profit (loss) which included transition costs. In the fourth quarter of fiscal 2025, UNIFI recorded a gain of $35,807 related the sale of a manufacturing facility.

[6] Net loss for our domestic operations for all fiscal quarters of fiscal 2024 includes the adverse pressures on gross (loss) profit. Net loss for fiscal 2024 includes both a loss on dissolution of a joint venture and severance costs.

[7] (Loss) income per share is computed independently for each of the periods presented. The sum of the loss per share amounts for the fiscal quarters may not equal the total for the fiscal year.