Enterprise-Wide Disclosures (Net Sales And Long-Lived Assets (Property, Plant, And Equipment) By Geographic Area) (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
Long-lived assets	30,496				27,925				30,496	27,925	26,974
Domestic (U.S.)
Segment Reporting Information [Line Items]
Net sales									361,886	347,552	301,891
Long-lived assets	8,988				11,406				8,988	11,406	8,969
Mexico
Segment Reporting Information [Line Items]
Long-lived assets	20,878				15,756				20,878	15,756	17,156
China
Segment Reporting Information [Line Items]
Long-lived assets	$ 630				$ 763				630	763	849
Foreign
Segment Reporting Information [Line Items]
Net sales									$ 105,911	$ 137,413	$ 132,106