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Enterprise Wide Disclosures (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jun. 30, 2018	Jul. 01, 2017	Jul. 02, 2016
Segment Reporting Information [Line Items]
Net sales	$ 117,028	$ 108,352	$ 111,725	$ 109,217	$ 118,544	$ 113,601	$ 118,517	$ 117,135	$ 446,322	$ 467,797	$ 484,965
Percentage Of Net Sales									100.00%	100.00%	0.00%
Key Tronic E M S
Segment Reporting Information [Line Items]
Net sales									$ 445,800	$ 466,600	$ 483,300
Keyboard
Segment Reporting Information [Line Items]
Net sales									$ 500	$ 1,200	$ 1,700

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Percentage Of Net Sales

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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