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Enterprise-Wide Disclosures Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail) | 12 Months Ended
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Jul. 01, 2017 | Jul. 02, 2016 | Jun. 27, 2015
Segment Reporting Information [Line Items] |  |  |
Percentage Of Net Sales | 100.00% | 100.00% | 0.00%
Domestic (U.S.) |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage Of Net Sales | 77.00% | 72.00% | 70.00%
Canada |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage Of Net Sales | 1.00% | 7.00% | 10.00%
Foreign |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage Of Net Sales | 22.00% | 21.00% | 20.00%

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- Definition Percentage Of Net Sales + References No definition available. + Details
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Namespace Prefix: | ktcc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementGeographicalAxis=dei_LocationDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |