Basis of Presentation; Condensed Notes (Policies)	9 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]
Fiscal Period	The fiscal quarter for Unifi, Inc. and all of its wholly owned subsidiaries ended on March 31, 2019, the last Sunday in March. The three-month periods ended March 31, 2019 and March 25, 2018 consisted of 13 fiscal weeks. The nine-month periods ended March 31, 2019 and March 25, 2018 consisted of 40 and 39 fiscal weeks, respectively.

Disclosure of accounting policy for determining an entity's fiscal year or other fiscal period. This disclosure may include identification of the fiscal period end-date, the length of the fiscal period, any reporting period lag between the entity and its subsidiaries, or equity investees. If a reporting lag exists, the closing date of the entity having a different period end is generally noted, along with an explanation of the necessity for using different closing dates. Any intervening events that materially affect the entity's financial position or results of operations are generally also disclosed.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=108774443&loc=d3e5291-111683

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
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-Subparagraph (SX 210.3A-02(b))
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.3A-03(b))
-URI http://asc.fasb.org/extlink&oid=27015204&loc=d3e355100-122828

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