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Fair Value Measurements (Assets And Liabilities Measured At Fair Value On Recurring Basis) (Detail) - USD ($) $ in Thousands | Jun. 30, 2018 | Jul. 01, 2017
--- | --- | ---
Level 1 |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Assets | $ 0 |
Level 2 |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Assets | 24 |
Level 3 |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Assets | 0 |
Interest Rate Swap |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Assets | 24 |
Foreign currency forward contracts, Financial Liabilities |  | $ (103)
Interest Rate Swap | Level 1 |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Liabilities |  | 0
Interest Rate Swap | Level 2 |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Liabilities |  | (103)
Interest Rate Swap | Level 3 |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Liabilities |  | 0
Forward Contracts & swaps |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Assets | 500 | 1,010
Foreign currency forward contracts, Financial Liabilities | (1,676) | (5,112)
Forward Contracts & swaps | Level 1 |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Assets | 0 | 0
Foreign currency forward contracts, Financial Liabilities | 0 | 0
Forward Contracts & swaps | Level 2 |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Assets | 500 | 1,010
Foreign currency forward contracts, Financial Liabilities | (1,676) | (5,112)
Forward Contracts & swaps | Level 3 |  |
Fair Value Disclosures [Line Items] |  |
Foreign currency forward contracts, Financial Assets | 0 | 0
Foreign currency forward contracts, Financial Liabilities | $ 0 | $ 0

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- Definition Fair Value Disclosures [Line Items] + References No definition available. + Details
Name: | ktcc_FairValueDisclosuresLineItems
Namespace Prefix: | ktcc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureRecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity. + References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueDisclosureRecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |