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Note 18 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands |  | 6 Months Ended
--- | --- | ---
Sep. 30, 2004 | Dec. 27, 2015
Assets Purchased for Construction of Plastic Bottle Processing Plant [Member] | Polyester [Member] |  |
Purchase Obligation |  | $ 7,150
Assets Purchased for Construction of Third-Party Products [Member] |  |
Purchase Obligation |  | $ 6,600
The Term of a Former Ground Lease | 99 years |
Number of Years of Monitoring and Reporting Costs of an Individual Site |  | 7 years

X
- Definition Number of years of monitoring and reporting costs of an individual site for environmental remediation. + References No definition available. + Details
Name: | ufi_NumberOfYearsOfMonitoringAndReportingCostsOfAnIndividualSite
Namespace Prefix: | ufi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The term of a former ground lease with E.I. DuPont de Nemours. + References No definition available. + Details
Name: | ufi_TheTermOfAFormerGroundLease
Namespace Prefix: | ufi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
Name: | us-gaap_PurchaseObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=ufi_AssetsPurchasedForConstructionOfPlasticBottleProcessingPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ufi_PolyesterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=ufi_AssetsPurchasedForConstructionOfThirdpartyProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |