Enterprise Wide Disclosures (Narrative) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 26, 2015	Sep. 26, 2015	Jul. 01, 2017	Jul. 02, 2016	Jun. 27, 2015
Segment Reporting Information [Line Items]
Net sales	$ 118,544	$ 113,601	$ 118,517	$ 117,135	$ 123,905	$ 118,448	$ 116,403	$ 126,209	$ 467,797	$ 484,965	$ 433,997
Percentage Of Net Sales									100.00%	100.00%	0.00%
Key Tronic E M S
Segment Reporting Information [Line Items]
Net sales									$ 466,600	$ 483,300	$ 432,100
Keyboard
Segment Reporting Information [Line Items]
Net sales									$ 1,200	$ 1,700	$ 1,900
Canada
Segment Reporting Information [Line Items]
Percentage Of Net Sales									1.00%	7.00%	10.00%